Scientists Free Audio & Video

Stephen Hawking, Arthur C. Clarke and Carl Sagan (via satellite) discuss the Big Bang theory, God, our existence as well as the possibility of extraterrestrial life.

Project Tuva is an enhanced video player platform released by Microsoft Research to host the Messenger Lectures series titled The Character of Physical Law given at Cornell University by Richard Feynman in 1964 and recorded by the BBC.

Walter Isaacson, author of the mega-selling, acclaimed biography of Benjamin Franklin, discusses his latest work focused on the most influential scientist of the 20th century, Albert Einstein.

Jane Goodall hasn't found the missing link, but she's come closer than nearly anyone else. The primatologist says the only real difference between humans and chimps is our sophisticated language. She urges us to start using it to change the world.

Nobel laureate James Watson opens TED2005 with the frank and funny story of how he and his research partner, Francis Crick, discovered the structure of DNA.

Published in 1920, Slosson’s Easy Lessons in Einstein is one of the first popularizations of Einstein’s theory of relativity.

Now, 150 years later and 200 years after Darwins birth, we celebrate the amazingly productive vision and reach of his theory.

In this lecture professor Chandak Sengoopta discusses the life of Charles Darwin covering the major events in Darwin's life including his voyage on the HMS Beagle and his eventual publication of On the Origin of Species in 1859.

The Nobel Prize in Physiology or Medicine is awarded by the Nobel Assembly at Karolinska Institutet, Stockholm, Sweden.

During and just after World War II, the quest for ever faster fighter planes reached an apparent natural barrier—the speed of sound.