Gabby Giffords, the former U.S. representative from Arizona, marked the third anniversary of her shooting by skydiving. Upon landing, she said the experience was "wonderful."
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What looks like a terrifying hole to the underworld is much more benign.
A central Texas getaway lures daredevils and those simply wanting to cool off.
Antarctica is oddly barren of iron-based meteorites. What could have happened to them?
2 waterfalls send half of a river on its way to Lake Superior. Where did the other half go?
Scientists are baffled at this seemingly altruistic behavior.