Just how big would an asteroid have to be to wipe out all of human life? We ask the experts to find out the impact that different sized objects would have on Earth.
Just how big would an asteroid have to be to wipe out all of human life? We ask the experts to find out the impact that different sized objects would have on Earth.
General Note
Streaming video file encoded with permission for digital streaming by Infobase on October 14, 2015.