Killer AsteroidDownloadable Video - 2015
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.
Publisher: [Place of publication not identified] :, American Institute of Physics, , 
Copyright Date: ©2015
Characteristics: 1 online resource (1 video file (3 min., 10 sec.)) : sd., col