Kathy Sullivan has no shortage of spirit for adventure and boldly going where at least very few have gone before. Even at 68, Sullivan isn't showing signs of slowing down, either.
In fact, the former astronaut has just broken new ground - or new ocean, if you prefer. She's already among the 550-odd select few who have visited space. Now, she's one of just eight people to visit the deepest part of the ocean, Challenger Deep - and she's both the first woman to do so, and the first person ever to visit both Challenger Deep and space.