Science
Explore the educational catalogue, one Discovery at a time.
- Archive 00487
The nuclear reactor geology assembled
- Archive 00488
Order without a repeating pattern
- Archive 00489
Why the ice stays on top
- Archive 00490
Growing the beginnings of a cloud
- Archive 00491
The seafloor's magnetic stripes
- Archive 00492
A soap film's answer to a geometry problem
- Archive 00493
Mirror-image molecules, different smells
- Archive 01348
Why a measurement needs a unit
- Archive 01349
A precise instrument can still be wrong
- Archive 01350
How uncertainty travels through a result
- Archive 01351
Why the kilogram no longer depends on one object
- Archive 01352
When a model is useful without being complete
- Archive 01353
How a control isolates a question
- Archive 01354
Why constant motion needs no continuing push
- Archive 01355
Why turning is a form of acceleration
- Archive 01356
What momentum keeps track of
- Archive 01357
Why a spinning skater speeds up
- Archive 01358
Where a dropped ball’s energy goes
- Archive 01359
Why power needs a clock
- Archive 01360
Why pressure grows with depth
- Archive 01361
How displaced water supports a floating object
- Archive 01362
Temperature is not a quantity of heat
- Archive 01363
Why evaporation cools a liquid
- Archive 01364
How heat crosses an empty gap
- Archive 01365
Why a gas pushes on its container
- Archive 01366
When waves reinforce or cancel
- Archive 01367
Why a passing siren changes pitch
- Archive 01368
How resonance builds an oscillation
- Archive 01369
Why sound cannot cross a vacuum
- Archive 01370
Why light bends at a boundary
- Archive 01371
How polarization gives light a direction
- Archive 01372
Why a narrow opening spreads a wave
- Archive 01373
What an electric field describes
- Archive 01374
Why voltage and current measure different things
- Archive 01375
How a changing magnetic field creates voltage
- Archive 01376
Why an atom has a line spectrum
- Archive 01377
What the photoelectric effect revealed
- Archive 01378
Why the periodic table repeats patterns
- Archive 01379
Why atoms form chemical bonds
- Archive 01380
How a mole connects particles to a balance
- Archive 01381
Why dissolving does not mean disappearing
- Archive 01382
Why pH uses a logarithmic scale
- Archive 01383
How a catalyst opens a faster route
- Archive 01384
Why equilibrium is still moving
- Archive 01385
Why hotter reactions often run faster
- Archive 01386
How electrons travel in a redox reaction
- Archive 01387
Why carbon makes long molecular chains
- Archive 01388
How chromatography separates a mixture
- Archive 01389
What an isotope changes about an atom
- Archive 01390
How a membrane makes a selective boundary
- Archive 01391
How diffusion can move matter without a pump
- Archive 01392
Why enzymes depend on their shape
- Archive 01393
What ATP transfers inside a cell
- Archive 01394
How DNA carries a sequence
- Archive 01395
Why copying DNA needs proofreading
- Archive 01396
How a cell reads a gene
- Archive 01397
How a ribosome builds a protein
- Archive 01398
Why cells with the same DNA differ
- Archive 01399
How meiosis reshuffles inherited material
- Archive 01400
Why a mutation is not automatically harmful
- Archive 01401
How bacteria exchange genes
- Archive 01402
How seismic waves reveal Earth’s interior
- Archive 01403
Why rocks keep changing category
- Archive 01404
What a mineral’s crystal lattice organizes
- Archive 01405
How radioactive decay becomes a geological clock
- Archive 01406
Why some faults creep and others lock
- Archive 01407
How a river sorts its sediment
- Archive 01408
Why groundwater moves through rock
- Archive 01409
What ice cores preserve about past air
- Archive 01410
Why entropy gives processes a direction
- Archive 01411
What a superconductor stops resisting
- Archive 01412
Why quantum uncertainty is more than poor equipment
- Archive 01413
How half-life describes a population
- Archive 01414
Why repeatability and reproducibility ask different questions
- Archive 01415
How dimensional analysis catches impossible equations