All's not as it appears, this tale has many twists -
but if I wasn't here documenting the story
would that mean that the plot did not exist?

— Peter Hammill

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...