"Cosmos- A SpaceTime Odessey" --Tonight in 'Rivers of Life' Neil deGrasse Tyson Covers Evolution and Mass Extinction Events

Tonight, the second of 13 episodes of "Cosmos- A SpaceTime Odessey" hosted by astrophysicist Neil deGrasse Tyson airs at 9 pm tonight on Fox and at 10 pm Sunday night on the National Geographic channel. Tonight's episode is "The Rivers...