The universe is like a safe to which there is a combination. But the combination is locked up in the safe.

— Peter De Vries

Scientists Think Big Object Whacked Mars

LOS ANGELES (June 25) - Why is Mars two-faced? Scientists say fresh evidence supports the theory that a monster impact punched the red planet, leaving behind perhaps the largest gash on any heavenly body in the solar system.

See full article:

http://news.aol.com/story/_a/scientists-think-big-object-whacked-mars/20...