[To Parent Directory] 12/6/2017 9:41 AM 19184865 Carl Sagan - Cosmos - Eratosthenes.mp4 9/18/2012 4:43 PM 20417544 Geodesy_in_a_Nutshell_NASA_movie.avi 12/6/2017 9:38 AM 11487487 How Eratosthenes calculated the Earth's circumference.mp4