Free Science Videos and Lectures

To reach other intelligences our technology must reach beyond interplanetary distances it has to go interstellar distances.

The largest radio radar telescope on the planet Earth - Arecibo radio...

This science video contains:
life, stars, carl sagan, milky way, galaxies, intelligence, civilization, radio telescope, extraterrestrial, arecibo, puerto rico, m15, signal, prime numbers

The universe began with the big bang, and for the first four hundred thousand years all matter was ionised, indicated by the blue region in the diagram. When the universe had cooled enough to allow...

This science video contains:
matter, stars, earth, big bang, galaxies, light, solar system, time, space, supernova, expansion