LiveScience.com - Experiences help to shape life, so it's reasonable to thinksomeone who grew up when John F. Kennedy was shot might have a different worldviewthan a person who witnessed Enron collapse and has been "wired" sincejust a tot.
Shortly after the Moon formed, an asteroid smacked into its southern hemisphere and gouged out a truly enormous crater, the South Pole-Aitken basin, almost 1,500 miles across and more than five miles deep.