Interactive exploration
Cities & TransportTraffic jams and traffic waves
Why do traffic jams happen?
One driver brakes. A slowdown travels through the road. Find out how a small action can affect everyone behind it.
Waves
A disturbance or pattern can travel through a system. Different kinds of waves have different mechanisms.
Background on this idea
Interactive explorationSpace & AstronomyBlack holes and light
If a black hole traps light, what are we actually seeing?
Inspect the real EHT observation, then choose a direction in a calculated light map. Follow its exterior path, find its source and reveal two images of one tiny patch.
Interactive explorationEarth, Weather & ClimateEarthquakes and seismic waves
How can three stations help locate an earthquake?
Watch waves emerge from a buried source, pick synthetic arrivals and reveal the location one clue at a time. Test the clocks, depth and velocity assumptions—and compare the model with real recorded evidence.
Interactive explorationBrain & SensesNeurons and nerve signals
How does a nerve cell send a message?
Nudge a membrane, discover when a spike appears, test its recovery, and cross a chemical synapse. Then inspect a real potassium-channel structure.
Interactive explorationEveryday TechnologyMicrowave ovens and heating
Why is one bite hot while the next is cold?
See through a closed microwave, follow a bite around the turntable, and compare where energy arrives with where heat spreads afterward.
Interactive explorationBrain & SensesEyes and vision
How does your eye bring the world into focus?
Open a sourced 3D eye, move a target nearer, and catch the moment its light comes together. Then discover why a smaller pupil is different from better focus.
Interactive explorationBrain & SensesHearing and the ear
How does a sound reach your brain?
Start with a vibration. Follow air, eardrum, tiny bones and hair cells, then see why the message reaching your brain is a different kind of signal.