Hundreds of physics, chemistry and biology simulations you can poke at — drag a mass onto a spring, mix a solution, build a circuit and watch it burn out.
Hundreds of small, clear simulations of physics, chemistry and earth science, from pendulums to tides.
Zoom continuously from the Planck length to the observable universe. Still stunning years later.
A space colony game whose lab doubles as a playground of live physics simulations, from orbits to black holes and wormholes.
The interactive periodic table everyone ends up linking to. Drag the temperature slider to watch the elements melt and boil, or switch to orbitals, isotopes and compounds.
Free dynamic mathematics software for geometry, algebra, statistics and calculus, all in-browser.
Pick a camera, lens, aperture and distance and watch the depth of field and background blur change on a sample photo.
