Dry ice lake suggests Mars once had a 'Dust Bowl'
Thursday, April 21, 2011 - 13:30
in Astronomy & Space
LOS ANGELES (AP) -- If you think Mars is a hostile place now, it was harsher 600,000 years ago....
LOS ANGELES (AP) -- If you think Mars is a hostile place now, it was harsher 600,000 years ago....