Carl Sagan on radio astronomy & the Drake Equation XXXSDESDEXXX 9:49 16 years ago 16 605 Скачать Далее
Carl Sagan On Alien Civilizations Neil deGrasse Tyson Videos 5:41 10 years ago 1 409 424 Скачать Далее
Why Any Solution to the Drake Equation is Scary No Matter the Answer Astrum 18:02 1 year ago 690 280 Скачать Далее
Nuclear Winter, Carl Sagan, & The Drake Equation with Neil deGrasse Tyson, Ann Druyan, & Brian Toon StarTalk 59:37 1 year ago 322 262 Скачать Далее
Carl Sagan explains how he came to know what the stars are XXXSDESDEXXX 5:18 16 years ago 25 688 Скачать Далее
Sheldon Talking About The Drake Equation - The Big Bang Theory YoureInMySpotFBPAGE 0:29 12 years ago 58 636 Скачать Далее
Carl Sagan explains the geometry of our universe XXXSDESDEXXX 4:37 16 years ago 182 038 Скачать Далее
