Matter, force, earth, sky and number, in one place.

Everything the museum school holds on the sciences that are not the living world: walls you can walk, what is on them, the panels they are taught from, the galleries of the science museum, and the lessons that use them. The living world has its own collection, the Zoo.

30walls 244things on the walls 41panels 19museum galleries 284lessons

The walls

Each wall is one great subject laid out to be walked, with the things on it named and explained.

On the walls, wall by wall

Open a wall to see what is on it and what to look for.

Aqueducts · 9

Name	Group	What to look for
Águas Livres	The Long After	Aqueduto das Águas Livres. The tallest stone arches ever raised for water — sixty-five meters.
Aqua Claudia	The Roman Line	Aqua Claudia. The arches stride the campagna like the ruin of giants; follow the line toward the city.
Les Ferreres	The Roman Line	Pont de les Ferreres. No water for centuries; the structure outlived the job and kept standing.
Pontcysyllte	The Long After	Pontcysyllte Aqueduct. The trough is cast iron; watch a narrowboat cross the open air.
Pont du Gard	The Roman Line	Pont du Gard. The channel drops about an inch in a hundred meters; feel the patience.
Roquefavour	The Long After	Aqueduc de Roquefavour. Bigger than Pont du Gard, built on the same idea, eighteen centuries later.
Segovia	The Roman Line	Aqueduct of Segovia. Twenty thousand blocks balanced for two millennia; find a single clamp.
The Qanat	The Hidden Water	Qanat. On the surface, only a line of well-mouths marching to the horizon.
Valens Aqueduct	The Roman Line	Aqueduct of Valens. A modern boulevard passes between its legs; the city grew around it, not over it.

Bridges · 12

Name	Group	What to look for
Akashi Kaikyō	The Modern Span	Akashi Kaikyō Bridge. The cables hold enough wire to circle the Earth seven times.
Brooklyn Bridge	The Chain and Cable	Brooklyn Bridge. Emily Roebling crossed first, carrying a rooster for luck.
Charles Bridge	The Arch	Karlův most. Eggs in the mortar, the legend says; the chemistry half agrees.
Clifton	The Chain and Cable	Clifton Suspension Bridge. The two towers differ — look closely; economy edited the design.
Forth Bridge	The Iron Age	Forth Bridge. The famous photograph: three men seated as the living force diagram.
Garabit Viaduct	The Iron Age	Viaduc de Garabit. The crescent arch is the tower's mathematics laid on its side.
Golden Gate	The Chain and Cable	Golden Gate Bridge. The color was a primer coat that won the argument.
Millau Viaduct	The Modern Span	Viaduc de Millau. The deck was pushed out from both sides, meeting 270 meters up.
Ponte Vecchio	The Arch	Ponte Vecchio. The corridor above the shops was the family's private commute.
Stari Most	The Arch	Stari Most. The divers still leap twenty-four meters, as they have since the Ottomans.
The Iron Bridge	The Iron Age	The Iron Bridge. The joints are carpenter's joints in cast iron; the material was new, the grammar was not.
The Rialto	The Arch	Ponte di Rialto. Critics promised collapse; four centuries of footsteps disagree.

Arches · 9

Name	Group	What to look for
Arc de Triomphe	The Empire of Echoes	Arc de Triomphe de l'Étoile. Stand at the center of the star; the city aims at you.
Arch of Constantine	Rome's Invention	Arcus Constantini. Spot the borrowed panels; the faces were changed.
Arch of Septimius Severus	Rome's Invention	Arcus Septimii Severi. Geta's name was chiseled away; read the erasure.
Arch of Titus	Rome's Invention	Arcus Titi. Inside the vault: the menorah relief, history carried in procession.
Delicate Arch	Nature Got There First	Delicate Arch. No architect; the physics is the architect.
Gateway Arch	The Pure Curve	Gateway Arch. It is the curve a hanging chain makes, turned upside down.
India Gate	The Empire of Echoes	All India War Memorial. Read the names; the arch is a list before it is a shape.
Taq Kasra	The Pure Curve	Arch of Ctesiphon. The parabola has stood without steel for fourteen centuries.
Washington Square Arch	The Empire of Echoes	Washington Square Arch. Marble over a temporary plaster original the city refused to lose.

Fault Wall · 9

Name	Group	What to look for
Base Isolation	The Rewritten Bet	The building rides the wave. The isolation floor in retrofitted city halls — daylight under the columns.
The Gift Basket	The Fault's Gifts	Harbors, springs, soil, heat. Vineyards on Vesuvius and Etna — the bet, planted in rows.
The Magnetic Stripes	The Torn Paper	The seafloor's barcode. The symmetry about the ridge — the same barcode reading out both directions.
The Ridge	Three Personalities	The planet's longest mountain range. Iceland's rift valley — walk between plates with a wall of each at your elbows.
The Seconds Network	The Rewritten Bet	Early warning. The phone alert arriving before the shaking: physics, raced and beaten.
The Survivor's Seismogram	The Rewritten Bet	The closing exhibit. The trace's duration — minutes of signature, and the skyline still there.
The Transform	Three Personalities	San Andreas, Anatolian, Alpine. Offset fences and streams — the fault's slow arithmetic between quakes.
The Trench and the Arc	Three Personalities	Subduction's paired signature. The Ring of Fire — the Pacific rimmed in the machine's output.
Wegener's Fit	The Torn Paper	Continental drift, 1912. The Glossopteris fern found on five continents: the plant that testified.

Lighthouses · 9

Name	Group	What to look for
Bell Rock	The War With Water	Robert Stevenson, 1810. The Stevenson dynasty signature: the family that lit the whole Scottish coast.
Eddystone	The War With Water	Four towers, 1698–1882. Smeaton's oak-trunk profile — the curve that gives the wave nothing flat to hit.
Fastnet	The War With Water	Ireland's Teardrop, 1904. Each block keyed to six neighbors; the tower is one stone pretending to be thousands.
Pharos of Alexandria	The Announcement	c. 280 BC · one of the Seven. The three stages — square, octagon, cylinder — every later tower quotes.
The Fresnel Lens	The Signature	Augustin-Jean Fresnel, 1822. The lens orders, first through sixth — the bigger the number, the smaller the harbor.
The Keeper's Log	After the Keepers	Three families to none. The last manned stations — automation emptied the towers within one working lifetime.
The Light and the Bridge	After the Keepers	GPS did not turn them off. A working light from a container bridge: two navigation eras exchanging the same sentence.
The Light Characteristics	The Signature	Fixed · flashing · occulting · group. Chart abbreviations like Fl(3) W 15s — three white flashes every fifteen seconds, a name in light.
Tower of Hercules	The Announcement	2nd century AD, still burning. Roman core inside the 1791 neoclassical skin — the promise outlasting its architecture.

Ocean Depth · 10

Name	Group	What to look for
Challenger Deep	The Basement	~10,935 m. The snailfish at depth records — vertebrate life's basement apartment.
The Abyssal Plain	The Ordinary Floor	4,000–6,000 m. Tracks in the sediment — the floor's slow citizens, doing their rounds.
The Door at the Bottom	The Basement	MOSTLY UNEXPLORED. The label — the museum's standing invitation to the next generation.
The Fisheries' Floor	The Sunlit Landing	Where the catch lives. The Humboldt panel on the Current Wall — one current, a fifth of the catch.
The Lamp Carriers	Twilight and Midnight	Bioluminescence below 1,000 m. The anglerfish's lure — a fishing rod grown from a forehead.
The Nightly Commute	Twilight and Midnight	Diel vertical migration. The sonar's false floor — a layer of life dense enough to echo.
The Nodule Question	The Ordinary Floor	Metals, grown by the eon. The growth rate: millimeters per million years, against a lease term.
The Photic Film	The Sunlit Landing	0–200 m. The phytoplankton bloom from orbit — the film photosynthesizing at continental scale.
The Pressure Gradient	Twilight and Midnight	One atmosphere per 10 m. The styrofoam cup shrunk by a dive — the toll, souvenir-sized.
The Whale Fall	The Ordinary Floor	A meteorite of food. The bone-eating worms — species that exist only at these addresses.

Census Wall · 9

Name	Group	What to look for
Domesday Book	The Old Counts	1086 — beyond appeal. The formula 'there is no more' closing entries — audit language, eleventh century.
The Category Question	The Counted and the Sorted	Sorted into boxes not chosen. The category lists changing edition to edition — identity, versioned.
The Closing Plate	The Room Counts Itself	The wall's export. Visitors checking the dashboard for their own dot. That is the lesson landing.
The Dissolve	The Aggregate	One pin into a median. The E24 echo — the survival table's aggregation row, exhibited.
The Han Snapshot	The Old Counts	2 CE — 57.7 million. The registers' purpose — tax and levy, the count's eternal engines.
The Kiosk	The Room Counts Itself	Add yourself. The median age jumping when a school group floods in.
The Layers Born Here	The Aggregate	Counts become maps. The tract boundaries on the estate's own maps — counting's fossils.
The Three-Fifths Clause	The Counted and the Sorted	Persons, entered as fractions. The clause's beneficiaries — representation inflated by the very people denied it.
The Undercount	The Counted and the Sorted	Missing people, moving money. The follow-up operations — billions spent chasing the last percent.

Sound Wall · 9

Name	Group	What to look for
Dorian	The Modes	The symmetric mode. Its step pattern reversed is itself; play it both directions and check.
Epidaurus	Rooms as Instruments	The whisper to row 55. The limestone seats filtering low rumble — a tuned material, not an accident.
Equal Temperament	The Modes	The comma, smeared. Bach's forty-eight — a prelude and fugue in every key, the compromise demonstrated.
Notation to Synthesis	The Silent Keyboard	Storing, freezing, freeing. A neume manuscript beside a sequencer grid: the same information, nine centuries apart.
Reverberation Time	Rooms as Instruments	Sabine's equation, 1898. Adjustable acoustic banners — rooms that retune for the program.
The City Played	Rooms as Instruments	Bells, calls, carillons. Curfew's etymology — couvre-feu, the bell that put the city to bed.
The Comma	The Ratio	The system does not close. The wolf interval — the one howling fifth where old tunings hid the error.
The Monochord	The Ratio	One string, all of harmony. The movable bridge — the experiment you can rerun in one minute.
The Silent Keyboard	The Silent Keyboard	The closing exhibit. Your own hand, hovering. The exhibit completes when it lands.

Weather Wall · 9

Name	Group	What to look for
FitzRoy's Forecasts	The Synoptic Map	The first public warnings, 1861. The word he coined: forecast — chosen to sound humbler than prophecy.
The Barograph Drawers	Live and Kept	A century of inked drums. The great storms' traces — pressure falling off the drum's printed scale.
The Bergen School	The Fronts	Air masses and battle lines. The wartime metaphor in the word front — weather mapped like the war just ended.
The Evening News Diagram	The Fronts	Warm sector, cold wedge, occlusion. The satellite loop matching the 1920s diagram — theory confirmed from orbit.
The Falling Glass	The Readable Sky	Pressure precedes weather. Old barometer faces — RAIN, CHANGE, FAIR engraved where numbers now sit.
The Live Field	Live and Kept	Streaming pressure and fronts. The isobars tightening — wind is the map's gradient made audible outside.
The Telegraph Network	The Synoptic Map	Simultaneity makes the map. The first synoptic charts — isobars hand-drawn from telegrams.
Three Days a Decade	Live and Kept	The forecast's scorecard. The skill curve — one of applied science's steadiest climbs.
Torricelli's Tube	The Readable Sky	1643 — the air has weight. The vacuum above the column — the first one deliberately made.

Weights · 10

Name	Group	What to look for
Le Grand K	The Constant	The platinum kilogram, 1889–2019. The scandal of the drifting prototype: the world's weight defined by a thing that changed.
The Cubit	The Body	Elbow to fingertip. The royal cubit rod: a ruler with a king's authority carved in.
The Decimal Cascade	The Meridian	Milli to kilo. The holdouts — a handful of nations still pricing in the old folklore.
The Fathom and the Li	The Body	Armspan and the walking unit. The lead line's knots: measurement you can do in the dark with wet hands.
The Foot and the Mile	The Body	Pes and mille passus. Milestones — the empire posting its own measure along the road.
The Market Standard	The Promise	Chained to the wall. Iron ells still set into European church walls — consumer protection in wrought iron.
The Meter	The Meridian	One ten-millionth of the quarter meridian. Delambre and Méchain's survey: two astronomers measuring France while it revolted.
The Planck Kilogram	The Constant	Redefined 2019. The Kibble balance — weighing mass against electricity to retire an artifact.
The Qin Unification	The Promise	One measure at sword point, 221 BC. Identical bronze weights issued across a continent: compliance you can excavate.
The Temple Weights	The Promise	Shekels in bronze and stone. The false-weight problem — scripture and statute cursing the light shekel alike.

Code Wall · 8

Name	Group	What to look for
Lovelace's Note G	The Loom	The first published algorithm. Her exact words on the Engine weaving 'algebraical patterns like the loom weaves flowers'.
The Estate's Stack	The Museum's Memory	This museum, served. The framed source: this wall's own code, hung as the closing exhibit.
The Integrated Circuit	The Shrinking	The city of switches. A die shot beside the estate's own city maps — the resemblance is not a metaphor.
The Jacquard Cards	The Loom	1804 — the pattern stored. A portrait woven in silk from 24,000 cards — the first bitmap.
The Open Question	The Museum's Memory	The mind half of the title. The label's phrasing — a question mark, curated on purpose.
The Relay	The Switch	A switch that flips switches. The wall's working panel: flip bits by hand, hear the AND gate agree.
The Transistor	The Shrinking	Bell Labs, 1947. The first transistor's ungainly rig beside a modern die photo — same idea, 10 billion times over.
Turing's Theorem	The Switch	1936 — one machine, all machines. The tape-and-head diagram — the entire industry, in one figure.

Calendars · 10

Name	Group	What to look for
Newgrange	Stone and Bone	c. 3200 BC, older than the pyramids. The seventeen minutes of light that the whole monument exists to catch.
The Drought Clock	Deep Time	The calendar that ends cities. The ring sequences going narrow — the years the schedule failed and the cities walked away.
The Egyptian Civil Year	Three Skies	365 days, no leap. The wandering year: Egyptian dates circling the seasons over 1,460 years.
The Gregorian Cut	The Politics of the Year	October 1582, ten days deleted. Nations adopting over 350 years — Britain 1752, Russia 1918: time as sovereignty.
The Julian Reform	The Politics of the Year	46 BC — the year of confusion. The one 445-day year that reset the drift; July, named for the reformer.
The Leap-Month Stitch	Three Skies	Metonic cycle: 19 years, 7 extra months. The Metonic arithmetic: 235 lunations ≈ 19 solar years, discovered at least three times.
The Lunar Calendars	Three Skies	Babylon to the Hijri year. Ramadan crossing the solar year — a calendar honest about its choice.
The Maya Long Count	Deep Time	Days numbered in the millions. The five-place day count on stelae: a timestamp legible after a millennium.
The Natural Archives	Deep Time	Tree rings, varves, ice cores. Cross-dated ring sequences reaching back ten thousand years, year by named year.
The Tally Bones	Stone and Bone	Upper Paleolithic lunar counts. The 29-notch clusters — a lunar month kept in a pocket.

Machines · 8

Name	Group	What to look for
Station One: The Lever	The Boast	A beam and a bag of sand. The moment arithmetic stamped on the beam — force times distance, both sides.
Station Three: Block and Tackle	The Compound	Pulleys, compounded. The rope's length paid out — four meters of pull for one of lift.
The Exchange Booth	The Conservation Law	Force × distance = constant. Friction's cut displayed honestly — no machine banks a profit.
The Gear Train	The Compound	Levers rolled into circles. The Antikythera fragment's gearing — the compound idea, ancient and astronomical.
The Last Plate	The Conservation Law	The wall's closing sentence. The children re-reading it after riding the lever. That is the wall working.
The Ramp and the Wedge	Six Bodies	The plane, at rest and driven. The axe head in the Drawer of Hands — the wedge, at palm scale.
The Screw	Six Bodies	A ramp around a post. Thread pitch as gear ratio — fine threads, patient power.
The Wheel and Axle	Six Bodies	A lever, rolled. The capstan bars — the Ships wall's anchors rose on this idea.

Scale Universe · 9

Name	Group	What to look for
Steps −10 to −15: Atom to Nucleus	The Inward Walk	10⁻¹⁰ → 10⁻¹⁵ m. The emptiness — the wall draws the atom honestly, which is to say blank.
Steps 1–7: Whale to World	The Outward Walk	10¹ → 10⁷ m. Step four — the city, the estate's home order of magnitude.
Steps 21–26: Galaxy to Web	The Outward Walk	10²¹ → 10²⁶ m. The web's foam pattern — the universe's largest architecture, and its last.
Steps −3 to −7: Ant to Virus	The Inward Walk	10⁻³ → 10⁻⁷ m. The optical microscope's floor around minus seven — light itself too coarse below.
Steps 9–16: Sun to Light-Year	The Outward Walk	10⁹ → 10¹⁶ m. The Voyager probes — four decades of flight, still inside step thirteen.
The Dashed Line	The Inward Walk	10⁻¹⁹ → 10⁻³⁵ m. The label: HERE THEORY WALKS ALONE.
The Four Gold Strides	The Occupied Middle	Room, building, city, region. The skyline silhouette at step two-and-a-half — the vertical push, to scale.
The Meter Origin	Step Zero	10⁰ — an arm span. The Weights wall's meridian meter — the origin's own origin story.
The Middle Occupant	The Occupied Middle	The log-center, inhabited. The 1977 Powers of Ten film — this wall's famous ancestor.

Current Wall · 22

Name	Group	What to look for
The 1715 Plate Fleet	The Wrecks	Eleven ships, one hurricane. The pirate house begins on this sand: the wreckers' camps drew every freebooter in the Caribbean.
The Agulhas	The Gyres	Western boundary, warm. Rounding the Cape of Good Hope means crossing this panel; masters still route around its worst line.
The Antarctic Circumpolar	The Gyres	The only unblocked current. The clippers' downhill road runs along it — east, forever, inside the Roaring Forties.
The Batavia	The Wrecks	Dead reckoning, 1629. The chronometer, a century later, is the answer to this panel; the Weights wall (commissioned) holds it.
The Benguela	The Gyres	Eastern boundary, cold. Where cold water meets the Namib: the fogs of the Skeleton Coast, named by its wrecks.
The California Current	The Gyres	Eastern boundary, cool. Cannery Row hangs on this panel — and emptied when the current's bounty was overfished.
The Canary Current	The Gyres	Eastern boundary, cool. First leg of the volta do mar: you leave Spain by sailing away from where you want to go.
The Clipper Route	The Routes	Out east, home by the Horn. On the globe it is the short way; on the flat map it looks like a detour. The Maps That Lied (commissioned) explains.
The Doldrums	The Winds	Intertropical Convergence Zone. The line-crossing ceremony was born of boredom here; steam's first conquest was this belt.
The Drift Bottle	The Wrecks	Message → satellite drifter. The Global Drifter Program's buoys phone home hourly; this wall's arrows are their tracks.
The Great Circle	The Routes	Steam's geometry. Honest tracks look bent on Mercator; the liner to Yokohama hugs the Aleutians on purpose.
The Gulf Stream	The Gyres	Western boundary current, N. Atlantic. A warm river inside the cold sea, drawn with hard edges; whalers told Franklin where they were.
The Humboldt Current	The Gyres	Eastern boundary, cold. When it falters, the fishermen named the failure for the Christ child: El Niño.
The Kuroshio	The Gyres	Western boundary current, N. Pacific. Castaways it carried east seeded old maps with rumors of land beyond the ocean.
The Manila Galleon	The Routes	Acapulco ⇄ Manila, 1565–1815. The longest-running shipping line in history — and its wrecks are the richest.
The Middle Passage	The Routes	The triangle's Atlantic leg. The wall does not look away. Geography is not innocent; neither were the owners of these hulls.
The Monsoon	The Winds	The wind that reverses. The dhow on the Ships wall is this wind made wood; Rome's pepper arrived on it.
The Tea Route	The Routes	Canton → London. Cutty Sark and Thermopylae, ocean-racing weeks apart and arriving hours apart.
The Trade Winds	The Winds	Easterlies, 0–30°. Columbus's outbound lane; the trades meet the sea and drive the gyres' warm rims.
The Volta do Mar	The Routes	The turn of the sea. The move that made Atlantic exploration a round trip instead of a one-way bet.
The Westerlies	The Winds	The Roaring Forties. The clipper route and every round-the-world race run inside this band.
The Whydah	The Wrecks	Slaver, taken; pirate, sunk 1717. The bell came up legible: THE WHYDAH GALLY 1716. The museum's favorite receipt.

Anatomy · 20

Name	Group	What to look for
The Antagonist Pair	THE MUSCULATURE	One swollen and short, its partner long and yielding.
The Blood Itself	THE CIRCULATION	The buffy coat - the thin white line between red and gold.
The Breathing Tree	THE PHYSIOLOGY	The grape-cluster alveoli where the trade happens.
The Capillary Bed	THE CIRCULATION	A single red cell folding to fit the pipe.
The Chemical Post	THE PHYSIOLOGY	The pituitary, pea-sized, running the whole postal service.
The Double Loop	THE CIRCULATION	The figure-eight through the heart's middle.
The Face's Forty	THE MUSCULATURE	The ring muscles of eye and mouth - the expression engines.
The Filter Pair	THE PHYSIOLOGY	The nephron - one filter of the million, traced whole.
The First Layer	THE MUSCULATURE	The fiber directions crossing like woven cloth.
The Hand, Twenty-Seven Bones	THE SKELETON	The carpal pebbles nested like river stones.
The Heart's Four Rooms	THE CIRCULATION	The thick left wall - the room that pushes to the toes.
The Knee, Opened	THE SKELETON	The cruciate cross at the joint's center.
The Long Table	THE PHYSIOLOGY	The velvet villi - the absorbing carpet, magnified.
The Muscle Fiber, Magnified	THE MUSCULATURE	The striations - the pull happens at those stripes.
The Skull, in Plates	THE SKELETON	The zigzag sutures, tight as dovetail joinery.
The Spine's Four Curves	THE SKELETON	The double-S in profile, load flowing through it.
The Standing Frame	THE SKELETON	The weight line falling ankle through hip through skull.
The Tendon and the Lever	THE MUSCULATURE	The Achilles - the body's strongest cord - taking the heel.
The Thermostat	THE PHYSIOLOGY	The skin's vessels wide open in heat, clamped in cold.
The Valve Question	THE CIRCULATION	The paired flaps closing behind the climbing blood.

Wind Wall · 9

Name	Group	What to look for
The Beaufort Scale	Force, Named	Wind as a number, 1805. The scale's prose: 'smoke rises vertically' to 'devastation'.
The Doldrums	The Sorted Sky	The intertropical convergence. The satellite view: a necklace of storms circling the equator.
The Heat Engine Storms	Feral and Harvested	Hurricane · typhoon · cyclone. The eye — the calm axle at the center of the planet's biggest wheel.
The Jet Streams	Force, Named	Rivers of wind at altitude. Flight times east vs. west — the jet stream on your boarding pass.
The Monsoon Harvest	The Timetable	Half of humanity waits. Onset-date records kept like scripture; the drought years ringed in red.
The Monsoon Reversal	The Timetable	Out in summer, home in winter. Sailing seasons in medieval rutters — schedules set by the sky.
The Roaring Forties	The Sorted Sky	Westerlies unopposed. The Southern Ocean swell — fetch measured in thousands of miles.
The Sail and the Blade	Feral and Harvested	Oldest use, newest harvest. The blade's airfoil — a sail spun ninety degrees and told to stay.
The Trade Winds	The Sorted Sky	The easterlies of commerce. The cumulus streets — clouds queuing downwind like traffic.

Knots · 10

Name	Group	What to look for
The Bench	After Rope	A fathom of line, untied. Your own hands. The museum's most democratic artifact costs a meter of cord.
The Bowline	The Grammar	The king of knots. The rabbit-and-tree tying rhyme; the loop that rescue services still trust.
The Clove Hitch	The Grammar	Quick grip, short memory. The failure mode: rolling under a swinging load. Every knot is a contract.
The Figure Eight	The Working Eight	The stopper that saves climbers. The doubled retrace — visually checkable at a glance, which is why climbing chose it.
The Ratline Rungs	Aloft	Clove hitches you climb. The grammar at scale: rigging as a text the crew read by hand.
The Sheet Bend	The Grammar	The honest join. Its topology is the bowline's: one knot wearing two jobs.
The Splice	Aloft	The permanent sentence. Eye, short, and long splices — the long splice passes through a block as if unjoined.
The Square Knot's Warning	The Working Eight	Reef knot, and its capsize. The capsized form — one pull and the square knot becomes a noose that lets go.
The Surgeon's Knot	After Rope	Ligature under tension. The doubled first throw — friction borrowed while the second throw arrives.
The Trucker's Hitch	The Working Eight	Mechanical advantage from nothing. The purchase — pull a meter, the load moves a third, the lashing sings tight.

Numbers Wall · 8

Name	Group	What to look for
The Billion Corridor	The Refusal	A thousand of these walls. The corridor diagram — the museum drawn to scale beside what it refuses.
The City Line	The Landmarks	The estate's model population. Per-capita arithmetic done at the wall — the line makes it honest.
The Day and the Year	The Landmarks	86,400 and 525,600. How early the day flag sits — not even a tenth of the way in.
The Field Itself	The Printed Million	1,000 × 1,000 dots. The moment visitors step back — the crowd becoming weather.
The Prime Field	The Gold Primes	78,498 gold dots. The thinning gradient — squint and the theorem appears.
The Thousand Comparison	The Printed Million	One column, held up. The single highlighted column — the ruler the field is measured in.
The Trillion Sentence	The Refusal	The wrap around the city. Visitors re-reading a headline number on their phones at the exit.
Twins and Gaps	The Gold Primes	Structure up close. The largest gap below a million — 148 dots of dark, findable.

Deep Time · 9

Name	Group	What to look for
The Brushstroke	The Door Frame	All recorded history. The museum's whole subject, findable with a magnifier.
The Cambrian Meter	The Crowded End	Body plans, suddenly. The Burgess Shale's cast — experiments evolution later discontinued.
The Dinosaurs' Five Meters	The Crowded End	Triassic to the stripe. How LATE they are: nearly at the door, and still ancient beyond grasp.
The Even Pace Rule	The Device	The wall's one instruction. Visitors accelerating through the Proterozoic — and the docents gently slowing them.
The Exit Sign	The Device	You are here, and only just. Your own step across the last millimeter — you just walked all of history.
The First Forty Meters	The Long Entrance	Hadean and Archean. Stromatolites — the only skyline for two billion years.
The Iridium Stripe	The Crowded End	Painted floor to ceiling. The same stripe in real rock at Gubbio — the afternoon, preserved worldwide.
The Last Five Centimeters	The Door Frame	The genus Homo. The hand axe from the Drawer of Hands — a million years, one centimeter here.
The Oxygen Catastrophe	The Long Entrance	~2.4 billion years ago. Banded iron formations — the oceans rusting, layer by layer.

Elements Pocket · 9

Name	Group	What to look for
The Closing Question	The Drawer	Who digs the urban mine?. The right-to-repair shelf — the question, already being answered badly and well.
The Cobalt Basin	The Map	Battery cathodes. The artisanal pits beside industrial ones — two economies, one ore body.
The Conscience Law	The Map	Conflict minerals disclosure. The 3TG list — tin, tantalum, tungsten, gold: the audited four.
The Copper and the Gold	The Anatomy	The conductors. The concentration arithmetic — a ton of phones out-grades a ton of gold ore.
The Dissection	The Anatomy	~half the periodic table. The rare-earth pinch — grams that decide whether the screen glows.
The Household Mine	The Drawer	Retired phones, kept. Your own drawer's inventory — the wall's homework assignment.
The Lithium Salars	The Map	Brine under salt flats. The ponds from orbit — turquoise rectangles on white salt.
The Processing Cities	The Cities	Smelter, terminal, fab. The fab's price tag — a single plant outcosting an airport.
The Rare-Earth Refineries	The Map	Neodymium, europium and kin. The refining share pie chart — the wall's most lopsided figure.

Ice Wall · 9

Name	Group	What to look for
The CO₂ Curve	The Drilled Library	The bubbles' testimony. The sawtooth then the spike — the shape once seen, never unseen.
The Ghost at Former Size	The Dated Ribbon	The house device. The gap between ribbons shrinking toward the present — the exhibit's quiet argument.
The Glacier's Motion	The Flowing Rock	Ice deforms under ice. Stakes surveyed season to season — the flow measured by walking.
The Great Lakes	The Continental Fact	The sculptor's basins. Ancient shorelines ringing the basins — the lakes trying several sizes first.
The Ice Core	The Drilled Library	Air, sealed annually. Volcanic ash bands used to cross-date cores continents apart.
The Last Maximum	The Continental Fact	~20,000 years ago. Beringia and Doggerland — drowned homelands under two shallow seas.
The Moraine	The Flowing Rock	The bulldozer's berm. Erratics — boulders resting hundreds of miles from their bedrock.
The Surveyed Retreat	The Dated Ribbon	Two centuries of snout lines. Repeat photography pairs — same tripod spot, a century apart.
The U-Valley and the Fjord	The Flowing Rock	V carved to U. Hanging valleys — tributary glaciers left stranded high on the main trench's wall.

Human Body · 9

Name	Group	What to look for
The Connectome	The Unfinished Map	86 billion neurons, unmapped. The label the old charts used: here be questions.
The Flip-Panel Skin	The Peel	The body's largest organ. The fingertip's ridges — the one body map police files keep.
The Heart at True Size	Child Height	A fist, at eye level. Your own fist — the museum's cheapest scale model.
The Muscular Layer	The Peel	Six hundred engines. Antagonist pairs — every motion braked by its opposite.
The Pump and Pipes	The Infrastructure	100,000 km of vessels. Capillaries one cell wide — the mains ending in alleys everywhere.
The Resident Workforce	The Infrastructure	The microbiome. The count: bacterial cells edging human ones in any honest tally.
The Skeleton	The Unfinished Map	The oldest map. Fused sutures — the skull's construction seams, dated like a building's.
The Telegraph	The Infrastructure	Nerves at 120 m/s. The reflex arc — decisions the spine makes before the brain hears.
Vesalius' Correction	The Peel	De Fabrica, 1543. The muscle men posed in landscapes — rigor wearing Renaissance theater.

Rivers · 9

Name	Group	What to look for
The Indus	The Cradles	Mohenjo-daro and Harappa. The dry bed beside the live one — the flood face shows the old course filling; the low face shows it abandoned.
The Los Angeles River	The Control Case	the river the city executed. Flood face: a mile of brown water wall to wall in hours. Low face: a trickle down the centerline of a channel shaped like a freeway.
The Mississippi	The Working Rivers	St. Louis · Memphis · New Orleans. At flood the river stands higher than the streets beside it; on the low face, the batture mud shows how far it condescends.
The Nile	The Cradles	Aswan to the Delta — the nilometer. Two faces: the black land under brown water in August, and the same fields in April with the river a channel and the silt already plowed.
The Rhine	The Working Rivers	Basel to Rotterdam — the toll river. The old meanders as oxbow scars beside the canalized run — flood face fills the scars back in, low face shows the engineering bare.
The Thames	The Working Rivers	London — embankment and barrier. Low tide exposes the working foreshore — the city's oldest archive. The flood face shows why the Barrier closes.
The Tigris & Euphrates	The Cradles	the land between the rivers. Canals leaving the river at right angles — the flood domesticated into a grid before any street was.
The Yangtze	The Working Rivers	Chongqing to Shanghai — Three Gorges. Flood rings painted on the gorge walls; on the low face, the old shoreline towns standing dry above the drawdown.
The Yellow River	The Cradles	Huang He — China's Sorrow. The river flowing ABOVE the rooftops behind its levees — the flood face is the terror, the low face the reason no one moves away.

The science and mathematics panels

Four-foot wall panels: one measured diagram, the numbered steps, the look-fors.

Build a Better One

Energy Everywhere

Make It Better, Prove It

Parts That Do Jobs

PROTOTYPE — LS1.A: Structure and function

Selection at Work

Series 10 — The Panel — 4x10 infographic

Series 11 — The Panel — 4x10 infographic

Series 12 — The Panel — 4x10 infographic

Series 13 — The Panel — 4x10 infographic

Series 14 — The Panel — 4x10 infographic

Series 15 — The Panel — 4x10 infographic

Series 16 — The Living Panel — 4×10

Series 17 — The Panel — 4x10 infographic

Series 18 — The Panel — 4x10 infographic

Series 19 — The Map Room — 4x10 infographic

Series 1 — The Panel — 4x10 infographic

Series 2 — The Monumental Periodic Table

Series 3 — The Panel — 4x10 infographic

Series 4 — The Panel — 4x10 infographic

Series 5 — The Panel — 4x10 infographic

Series 6 — The Mechanics Panel — 4×10

Series 7 — The Optics Panel — 4×10

Series 8 — The Biology Panel — 4×10

Series 9 — The Panel — 4x10 infographic

The Brush and the Pick

The Method and the Machine

The Mounted Beast

The Push and the Pull

The Reaction Panel

The Solar Neighborhood

In the museum

The galleries of the science museum, and what stands in them. Exhibits open from the museum floor for key holders.

Gallery II · Element WorksThe monumental periodic table — 28 by 40 feet of it. Three metals in the hand, then the wall hunt. [SCIENCE · ST02 · 3 drawers]
Gallery III · Reaction WorksThe Reaction Lab: colour, gas, heat, precipitate. The indicator works, the missing grams, the citric repeat. [SCIENCE · ST03 · 4 drawers]
Gallery I · Measurement WorksThe first room in the building and the first room of childhood: ruler, balance, stopwatch, leaf rule. The instruments a seven-year-old learns to hold steady. [SCIENCE · ST01 · 5 …
Gallery IV · Distillation WorksSeparation as a craft — the distillation line, the fraction, the condenser. [SCIENCE · ST04 · 3 drawers]
Gallery IX · The Number LineTHE DEEPEST WALL ON THE ESTATE — seven drawers of number, from counting to graph-paper country. [MATH · ST09 · 7 drawers]
Gallery VII · Optics WorksLight bent, split, focused and reflected. The lens bench and the spectrum. [SCIENCE · ST07 · 2 drawers]
Gallery VI · Mechanics WorksLevers, pulleys, ramps and mechanical advantage — the mathematics of the cut and the lift. [SCIENCE · ST06 · 2 drawers]
Gallery V · Magnet WorksField made visible: iron filings, the compass, the coil that turns current into pull. [SCIENCE · ST05 · 4 drawers]
Gallery XIII · The Supervision BenchWhere a human checks the machine: exceptions, ethics, and the off switch. THIN — series drawer only (#8060). [TECHNOLOGY · ST13 · 1 drawer]
Gallery XII · The Instrument VaultThe instruments a society uses to measure itself. THIN — series drawer only (#8060). [TECHNOLOGY · ST12 · 1 drawer]
Gallery XI · The Code ShopComputing from the floor up. THIN — the series drawer stands and nothing behind it yet (#8060). [TECHNOLOGY · ST11 · 1 drawer]
Gallery XIV · The Stone YardTwenty-four rock sample drawers with the click-flip to specimen-on-black, and the bench tests live — press vinegar and the calcite family lights. [SCIENCE · ST14 · 2 drawers]
Gallery XIX · The Museum of WonderThe room that stops you walking. Objects that are simply too large, too bright, too still or too clever to pass by — beginning with the blue whale. [WONDER · ST19 · flexible]
Gallery X · The Proof RoomWhere a claim must be shown, not asserted. Geometry, argument, and the demand for a reason. [MATH · ST10 · 4 drawers]
Gallery XV · The ObservatoryThe galaxy map that fires closer like a space telescope; the stellar sequence and the distance ladder. [SCIENCE · ST15 · 1 drawer]
Gallery XXIII · The Reptile HouseA heat lamp, a shade end and a thermometer; skins, shells and eggs to handle; the giants at life size along the wall: Komodo dragon, saltwater crocodile, reticulated python, leath…
Gallery XXII · The Great AquariumOne great tank wall, river on one side and sea on the other. Sharks at length, whales and dolphins, the fresh-water half of all fish. The ichthyosaur paddle beside the dolphin sku…
Gallery XXI · The Dinosaur HallBones, eggs, teeth and tracks, and the argument that joins them. A sauropod thigh bone taller than the visitor, a floor rule to pace out the giants, a bird skeleton beside a small…
Gallery XXIV · The Mammal HallSkulls and coats to handle, and the whole range of size at life size: a blue whale paced out along the floor, an elephant and a giraffe on the wall, a shrew in a spoon. Shares its…

Exhibits 53

[1] SizeThe Museum of Wonder
[2] LengthThe Museum of Wonder
[3] FoodThe Museum of Wonder
[4] MatingThe Museum of Wonder
[5] Global RangeThe Museum of Wonder
[6] ConservationThe Museum of Wonder
[7] Other WhalesThe Museum of Wonder
Celestial VoidThe Museum of Wonder
Count What MattersThe Number Line
Distillation WorksDistillation Works
Element WorksElement Works
Graph Paper CountryThe Number Line
Kinetic CarnivalThe Museum of Wonder
Magnet WorksMagnet Works
Measurement WorksMeasurement Works
Mechanics WorksMechanics Works
Optics WorksOptics Works
QuietudeThe Museum of Wonder
Reaction WorksReaction Works
Read the RulerMeasurement Works
Salt & WaterDistillation Works
The Angle KitThe Proof Room
The Area ArgumentThe Proof Room
The BalanceMeasurement Works
The Blue Whale HallThe Museum of Wonder
The Citric RepeatReaction Works
The Code ShopThe Code Shop
The Compass That LiedMagnet Works
The Decimal SlideThe Number Line
The ElectromagnetMagnet Works
The Field MapMagnet Works
The Five Lagrange PointsThe Observatory
The Fraction WallThe Number Line
The Indicator WorksReaction Works
The Instrument VaultThe Instrument Vault
The Leaf RuleMeasurement Works
The Missing GramsReaction Works
The Negative FloorThe Number Line
The Number LineThe Number Line
The ObservatoryThe Observatory
The Parabolic MirrorThe Museum of Wonder
The PinholeOptics Works
The PlateauDistillation Works
The Proof RoomThe Proof Room
The Proof StripThe Proof Room
The Ramp TestMechanics Works
The Ratio TableThe Number Line
The Stone YardThe Stone Yard
The StopwatchMeasurement Works
The Stream TableThe Stone Yard
The Supervision BenchThe Supervision Bench
The Wall HuntElement Works
Three MetalsElement Works

The lessons

The science and mathematics lessons. A lesson opens for enrolled families and key holders.

MA1 The Number Line · The Number Line · 8 lessons

MA1 The Number Line · Count What Matters · 8 lessons

MA1 The Number Line · The Fraction Wall · 8 lessons

MA1 The Number Line · The Decimal Slide · 8 lessons

MA1 The Number Line · The Ratio Table · 8 lessons

MA1 The Number Line · The Negative Floor · 8 lessons

MA1 The Number Line · Graph Paper Country · 8 lessons

MA2 The Proof Room · The Proof Room · 8 lessons

MA2 The Proof Room · The Angle Kit · 8 lessons

MA2 The Proof Room · The Proof Strip · 8 lessons

MA2 The Proof Room · The Area Argument · 8 lessons

MA3 Keeping Track · The Running Log · 8 lessons

MA3 Keeping Track · The Middle · 8 lessons

MA3 Keeping Track · The Spread · 8 lessons

MA4 Measure and Map · Read the Instrument · 8 lessons

MA4 Measure and Map · The Scale Bar · 8 lessons

MA4 Measure and Map · Rate and Count · 8 lessons

MA5 Compass and Straightedge · The Proof Room · 30 lessons

MA5 Compass and Straightedge · Measurement Works · 3 lessons

MA5 Compass and Straightedge · The Stone Yard · 3 lessons

SC1 Matter and Reaction · Element Works · 8 lessons

SC1 Matter and Reaction · Reaction Works · 8 lessons

SC1 Matter and Reaction · Distillation Works · 8 lessons

SC2 Force, Field and Light · Magnet Works · 8 lessons

SC2 Force, Field and Light · Mechanics Works · 8 lessons

SC2 Force, Field and Light · Optics Works · 8 lessons

SC4 Earth and Sky · The Stone Yard · 8 lessons

SC4 Earth and Sky · The Observatory · 8 lessons

SC4 Earth and Sky · The Field Station · 8 lessons

SC5 The Instrument and the Method · Measurement Works · 8 lessons

SC5 The Instrument and the Method · The Instrument Vault · 8 lessons

SC5 The Instrument and the Method · The Supervision Bench · 8 lessons

SC5 The Instrument and the Method · The Museum of Wonder · 8 lessons

SC6 Computing · The Code Shop · 8 lessons

More doors

AtomsThe atom, built up
HabitabilityWhat a world needs
NGSSThe standards the panels answer
SucroseOne molecule, turned in the hand
The GIS LabMaps as evidence
The MagnetThe teaching station
The Math BoardProblems on the board
The Mechanics PanelA panel read the way a student reads it
The WallsThe directory of the great teaching walls
The ZooThe living world: the twin of this collection