The brilliant American astronomer Carl Sagan lauded the brilliance of the ancient Greek scientists in his groundbreaking television series “Cosmos,” elucidating just how Eratosthenes figured out how ...
On November 9, the world will mark Carl Sagan's 90th birthday. Sagan died in 1996 at the age of 62. Most people remember Sagan as the co-creator and host of the 1980 "Cosmos" television series ...