Carl Sagan was deemed the ‘people’s scientist’ as he brought the distant stars into people’s homes with his award-winning 1980 television series Cosmos: A Personal Voyage. He also popularized science with many books, the most famous being Cosmos (the best-selling science book ever published in English), and The Dragons of Eden: Speculations on the Evolution of Human Intelligence, which was awarded a Pulitzer Prize. He was also the author of Contact, a best-selling science fiction novel that was made into a movie starring Jodie Foster in 1997.
In this video, Carl Sagan describes the second, third, and fourth dimensions; or rather, the limitations of the second dimension to see the third, and the third to see the fourth, in a wonderful, witty, and most importantly – simple manner.




