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 most famous American astronomer and astrophysicist Carl Sagan explains the Drake equation.

The Drake equation (rarely also called the Green Bank equation or the Sagan equation) is a famous...

This science video contains:
life, planets, stars, carl sagan, drake equation, extraterrestrial intelligence

Sagan was central to the discovery of the high surface temperatures of the planet Venus.

In the early 1960s, no one knew for certain the basic conditions of Venus' surface and Sagan listed the...

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venus, carl sagan, planet, nasa, 1960

This is our home. Earth from 4 billion miles (Voyager 1991).

This is here. This is us. On it every one you ever heard of. Every human being who has ever lived. All our joys and sufferings....

This science video contains:
earth, carl sagan, planet, milky way, voyager, satellite, human, inventor, explorer, universe