Science courses

Follow salmon from freshwater to the open ocean and back as magnetic cues provide broad direction and learned river odors refine the final search.

See how a sealed vapor-compression loop moves heat out of a refrigerator, and how controls, defrost, refrigerants, and insulation shape the result.

Follow oxygen from a whale's lungs into its blood and muscles, then see how heart rate, blood flow, flexible lungs, and gliding stretch a dive.

Follow blood through the glomerulus and nephron as pressure, reabsorption, secretion, and dialysis shape what leaves the body as urine.

Follow the replication fork as helicase opens DNA, polymerase builds new strands, Okazaki fragments are joined, and proofreading protects the copied sequence.

Follow a tiny coral polyp as it partners with algae, deposits calcium carbonate, reproduces, and joins generations of builders to create a reef.

Trace how anaesthetic drugs alter receptors, arousal, networks, and bedside signals—and why no single monitor is a direct readout of consciousness.

Trace how runoff, tides, sediment, plants, and microbes change pollutants in coastal wetlands—and learn why retention is not always permanent removal.

Trace how antigen-specific cells and antibodies preserve a trained response, then see why boosters can make recall faster without guaranteeing perfect protection.

Follow surge, waves, erosion, sediment, surviving roots, and restoration to see why one storm can damage a wetland and also reshape its path to recovery.

See how water levels, elevation, sediment, migration space, and living shorelines shape wetland resilience—and why adaptation must keep uncertainty and tradeoffs visible.

Follow carbon through marshes, mangroves, and seagrass—from plant growth and tidal export to buried soil, disturbance, restoration, and honest climate accounting.

Follow water, sediment, nutrients, and animals through connected coastal wetlands, and see how tides, barriers, and restoration change the route.

Mix flour, lukewarm water, salt, and yeast, knead until it is smooth, and wait until it is puffy. A first dough tonight, with the science that makes it stretch.

Cook the yolks to 160°F, keep the mascarpone cold, and roll hard ladyfingers for two seconds. A first pan tonight, with the science that makes it stand.

Dry the bread, mix three eggs to a cup of milk, and soak until a slim dry spine remains. A first plate tonight, with the science that keeps the center custard.

Rinse the starch, rice the russets, fold the butter before the milk. A first pot tonight, with the science that keeps it fluffy.

Trace sound through a hearing aid's microphone, digital processing, receiver, feedback control, and fitting—and see why better access to sound is not the same as normal hearing.

Learn why space has a cold radiation background but spacecraft, lunar soil, and telescope instruments can reach very different temperatures.

Learn how dogs use human faces alongside voice, body posture, attention, and experience - without turning a glance into a human emotion label.

Learn how a star's tiny, repeating wobble revealed 51 Pegasi b and changed the search for planets around Sun-like stars.

Learn how stellar orbits, binary companions, gravitational lensing, and the Event Horizon Telescope turn invisible black holes into measurable objects.

Follow a meteorite from mineral selection to isotope measurement, and learn how scientists separate a date from the story it tells.

Follow the pressure, oxygen, and gas changes that make an unprotected vacuum exposure an emergency, then see how a spacesuit prevents them.

Follow surviving roots, seed sources, succession, and changing recovery clocks to understand why forests may return after fire without returning in exactly the same form.

Follow delayed light from a galaxy through mirrors, detectors, deep exposures, multiple wavelengths, and redshift - and learn which conclusions are measurements and which depend on models.

1.0 milliliter into 9.0 milliliters. Mix. That tube is one-tenth the last, and the next tube is one-tenth of this one — a chain, not a single heroic pipette.

See how pressure, layered protection, and human-centered testing let a spacesuit glove keep an astronaut’s hand safe and useful.

Trace how geophysical data, rocks, and fossils reveal the buried Chicxulub impact and its global consequences.

Follow a reactor from control-rod insertion to cold shutdown and see why stopping fission is only the first safety job.

Follow the energy trade that lets a helicopter descend, preserve rotor rpm, and land after engine power is lost.

Follow the Dead Sea's retreat from a closed basin and diverted river to salt ponds, sinkholes, and a regional water decision.

Follow the first winter crew at the South Pole as they turn a remote summer station into a working scientific outpost through months of darkness.

Learn how Earth's rotation gives eastward launches a head start, and why orbit, latitude, and safety can outweigh that bonus.

Every road is quietly tilted to move rain off the wheel path. Trace camber from the crown to the drain and see why a curve has to break its own rule.

Use the Drake equation to separate what astronomy measures from what biology and technology still leave uncertain.

See how one specialized aircraft’s engines, twin tail, landing gear, and loading systems grew from the problem of moving extraordinary cargo.

See how albatrosses harvest wind for long ocean journeys, then compare their strategy with frigatebirds that sleep in short bursts and swifts that stay airborne for months.

See how magnetic levitation replaces wheel contact, turns the guideway into a motor, and trades rolling friction for the costs of a precise high-speed network.

Follow the copper chemistry, gills, three hearts, and costly jet propulsion behind an octopus's blue blood.

Follow nuclear propulsion from fission heat to steam, then see how life support, water, food, sensors, and routines make long submerged patrols possible.

Follow an ant's trip home as it combines an internal compass, distance tracking, landmarks, scent, and a final search.

You are being told you cannot do astronomy without a great telescope. Chambers’s answer is a painter at an attic window, with two and a half inches of glass.

Bennett's 1903 handbook starts in a hammock: south slope, then soil, then glass. You learn shifting from repotting, and why a wet cover can kill what frost would spare.

Read residual plots to spot curvature, changing spread, outliers, and other clues about how well a regression model fits.

Read the Cascade Range as a living system of subduction, volcanoes, glaciers, rivers, and weather.

Read a regression line by separating observed values, predictions, slope, intercept, residuals, and the limits of extrapolation.

Build free-body diagrams, add force vectors, and use Newton's second law to predict acceleration without confusing mass, weight, normal force, or friction.

Use layers, faults, intrusions, and unconformities to reconstruct which geologic events came first, then separate relative order from numerical age.

Read arrow direction, trace feeding paths, and make cautious predictions about energy and population changes in a food web.

Learn to read temperature and precipitation axes, find wet and dry seasons, calculate annual temperature range, and write a bounded climate-graph interpretation.

Learn to read confidence intervals, explain their repeated-sampling meaning, and judge precision, assumptions, and population claims.

Set up a spectrophotometer, choose a compatible cuvette and wavelength, blank correctly, and check whether an absorbance result is trustworthy.

Separate inherited genetic information from observable traits, then use simple inheritance models without mistaking a phenotype for a DNA result.

Learn to distinguish mitosis from meiosis by tracing homologs and sister chromatids, counting chromosome sets, and using the sequence and outcome as evidence.

Follow a DNA diagram from promoter to RNA product: identify the template strand, read its direction, and separate transcription from eukaryotic RNA processing.

Turn balanced reversible equations into equilibrium expressions, choose concentrations or partial pressures, omit pure phases, and use Q to predict the direction of change.

Use reduction-potential tables to identify cathode and anode, calculate standard cell potential, and know when the Nernst equation is needed.

Calculate percent error from a measured and accepted value, keep units and rounding honest, and separate accuracy from precision.

Learn to read calibration curves, prepare and inspect standards, solve a linear calibration equation, check the working range, and report an unknown with its limits.

Learn to read reaction-energy diagrams, calculate activation barriers and ΔH, distinguish rate from overall energy change, and see how catalysts reshape the pathway.

Read axes, locate equivalence, distinguish endpoint from chemistry, and use titration data to estimate concentration and pKa.

Learn to read carrying capacity and logistic growth curves, distinguish exponential growth from resource-limited growth, and explain plateaus, changing ceilings, and overshoot.

Learn to read velocity-time graphs by connecting height, slope, and signed area to velocity, acceleration, and displacement.

Learn to convert units with visible cancellation, move between mass and moles, handle squared and cubed units, and audit chemistry answers by their dimensions.

Learn to identify the four gas variables, match units to the gas constant, solve direct and two-state problems, and recognize when the ideal model may fail.

F_net = ma — net force, mass, and acceleration. Resolve components, separate mass from weight, and check units before you trust the number.

Turn a research question into a defensible statistical test by matching variables, group structure, dependence, study design, and uncertainty.

Learn how chi-square tests compare observed and expected category counts, choose the right test, check its assumptions, and explain what a p-value does and does not show.

A sick Faraday pulls a sheet of paper over with a string, then without touching it, and asks you how few powers run the world.

Learn to read phylogenetic trees as maps of shared ancestry, using roots, nodes, topology, branch lengths, clades, and evidence.

Learn how concentration, pressure, temperature, inert gases, and catalysts affect a chemical equilibrium—and when the reaction quotient can check your prediction.

See how MRI uses proton magnetism, radiofrequency pulses, gradients, and reconstruction to turn measurements into images—then learn why safety screening matters.

Follow a medical ultrasound pulse from the probe through tissue and back again, then see how timing, echoes, Doppler, and imaging limits shape the picture.

Trace a skyscraper's forces from wind and floors through foundations and into the ground, including the temporary systems that make deep construction possible.

Temperature as a line, rain as bars, months across the bottom. Learn to read climographs, climate normals, and the jump from pattern to Köppen regime.

One division keeps your chromosome count; two divisions halve it for gametes. Learn to read the X, spot homologs, and ask what a figure is for.

Read layers, faults, intrusions, and unconformities as evidence, then turn their visible relationships into a cautious relative sequence of geological events.

Learn to find torque from force, lever arm, and angle, assign its direction, and test whether opposing turning effects balance.

Learn to read temperature-pressure axes, identify stable phases and coexistence boundaries, and trace melting, boiling, sublimation, and supercritical behavior.

Choose the right micropipette, control aspiration and dispensing, select forward or reverse technique, and verify delivered volume with repeatable measurements.

Follow DNA replication from template strands and RNA primers to 5-prime-to-3-prime synthesis, leading and lagging strands, Okazaki fragments, and ligation.

Follow wood chips or recovered paper through pulping, screening, web forming, pressing, drying, calendering, and winding.

Snip the rim of a Sarsia and the bell goes still — while the thread you cut off keeps beating. An 1885 seaside physiology of animals with no brain.

Calculate molarity from moles, mass, and solution volume, then use units to prepare and dilute solutions without losing the thread.

Use the Henderson-Hasselbalch equation to connect pKa, conjugate-pair ratios, buffer pH, capacity, and the limits of the approximation.

Follow a measured batch of sand, soda ash, limestone, and cullet into a furnace, across a molten-tin bath, and through a cooling lehr. See how one continuous ribbon becomes reliable flat glass.

Follow air through a jet engine as compressors, combustors, turbines, and fans turn fuel energy into thrust.

At sunset an aye-aye taps a worm-eaten branch with a finger like bent wire. A Victorian mammal book that teaches you to test a story against a body.

Trace loads from deck to hangers, cables, towers, anchorages, and foundations, then see how wind, construction, and maintenance shape a bridge's safety.

Follow a drop from a changing source through clarification, filtration, disinfection, and the distribution system that carries it to your tap.

See how phases, detectors, timing plans, and pedestrian service turn a busy intersection into a coordinated control system.

Follow heat through the compressor, condenser, expansion device, and evaporator to see why a refrigerator cools its food while warming the room.

Trace food from inputs to meals, then use boundaries, controls, measures, and trade-offs to see how the whole system shapes the result.

Map manufacturing as inputs, transformations, measurements, controls, and failure boundaries without pretending every factory works the same way.

Beagle patterns, pigeon breeds, island maps, and an entangled bank: Darwin’s 1859 Abstract argues for descent with modification — and takes the eye and sterile ants seriously.

Learn to isolate one object and identify weight, normal force, and friction on a free-body diagram.

Use signed distances, magnification, and ray diagrams to solve and check thin-lens problems.

Map a farm as a system: identify its inputs, activities, controls, outputs, and feedback without pretending every farm works the same way.

Read an energy pyramid correctly, explain why it narrows upward, and distinguish energy from biomass and organism counts.

Use voltage, current, and resistance together, read the slope of a voltage-current graph, and check circuit results with power.

James Geikie’s 1893 essays teach you to read hills, valleys, erratics, and missing rock layers as a damaged archive—and to keep his field method while updating his climate engines.

Calcutta, 1833. After twenty-six years as a surgeon in India, George Playfair translates a Unani materia medica because his Pharmacopeia has no name for the medicines he has watched other physicians use.

Trace current and voltage through series and parallel resistor networks, reduce mixed circuits, and check your result with power.

Read wavelength, amplitude, frequency, period, phase, and wave type from clear diagrams.

Keep the reading frame fixed as you use an RNA codon chart to translate triplets into amino acids and recognize start and stop signals.

Calculate density from mass and volume, measure irregular objects, and interpret floating without overclaiming.

Understand why exponential growth accelerates, how the model dN/dt = rN works, and why real populations cannot grow this way forever.

Read slopes and plateaus on a heating curve, then connect phase changes with pressure, latent heat, and energy equations.

Learn how system boundaries, signed velocity, and external impulse determine whether momentum is conserved in a collision.

Learn how light bends at a boundary, why angles use the normal, and when total internal reflection can occur.

Learn to balance acid-base equations by separating formulas, coefficients, ions, charge, and mole ratios.

Learn how charge, gel pores, migration distance, and a DNA ladder turn an invisible mixture into a readable pattern.

Learn to assign oxidation numbers, solve unknowns, and use changes in the numbers to identify redox reactions.

Learn how a 1908 laboratory manual turns specimens into evidence, then separate its durable habits of checking from its obsolete medical advice.

June 1896, Kingston Harbour. A Johns Hopkins student nets two box-shaped jellyfish that no published name yet fitted, then dies before he can finish their life history.

Learn how a telescope turns light into evidence, from Galileo's first discoveries to the Moon, planets, stars, and nebulae you can begin to observe yourself.

Read Herbert Spencer's ambitious synthesis of matter, metabolism, development, adaptation, and evolution, then test its nineteenth-century mechanisms against modern biology.

The kettle is on. If the garden is close enough, Ida D. Bennett says you can hoe lettuce while you wait. A 1920 kitchen-garden book about location, timing, and what not to copy.

Explain why menthol feels cold by activating TRPM8 and engaging trigeminal cooling pathways, with water, airflow, and context amplifying the perception.