cosmos

A short clip from Carl Sagan's Cosmos in which he explains how Eratosthenes measured the circumference of the Earth using shadows in two Egyptian cities. It is a clear, visual account of an ancient scientific feat.

A segment from Carl Sagan's original Cosmos explaining the fourth spatial dimension through analogy with a two-dimensional world and shadow projection.

An episode of Journey to the Microcosmos, hosted by Hank Green, about diatoms, single-celled algae with glass shells. It covers their role in producing a large share of Earth's oxygen and their uses in beer filtering, paint and kitty litter.

A Symphony of Science music video that auto-tunes samples of Carl Sagan, Richard Feynman, Neil deGrasse Tyson and Bill Nye into a song about the wonder of the universe.

Cosmo's 22:38 Ocarina of Time speedrun, performed live at AGDQ 2013. The runner uses a complex exploit to skip much of the game.

A 29-minute cinematic timelapse by melodysheep that journeys trillions of years into the future, covering the death of the sun, the end of stars, proton decay, black hole evaporation and the fate of the cosmos.

A 146-minute Merged Podcast episode in which UAP researcher Ryan Graves talks with economist Robin Hanson about UFOs. Topics include the Great Filter, Hanson's grabby aliens model, and the push for more inquiry into UAPs.

A short Tim and Eric Awesome Show sketch, The Universe I, II & III, in which the cosmos is shown in a deliberately absurd way. It is an Adult Swim surreal comedy bit.