The Universe: The Complete Season Six [3 Discs] [Blu-ray]

"Featuring stunning CGI, NASA footage, and commentary from some of the world's leading astrophysicists, the 6th season of The Universe delves into topics including the consequences Earth would face were it to be hit by an asteroid, and a theory proposing a massive star is called Nemesis has caused all of the mass extinctions in the planet's history."