The Most Astounding Fact (Neil deGrasse Tyson, HD)
Astrophysicist Dr. Neil DeGrasse Tyson was asked by a reader of TIME magazine, “What is the most astounding fact you can share with us about the Universe?” This is his answer. Please subscribe above! Watch the definitive version on Vimeo: http://vimeo.com/38101676 Now in 11 languages (click CC)! Watch in HD!