From the heights to the depths: Space pioneer is first woman to dive to ocean's deepest point

The first American woman to walk in space has again made history as the first woman to travel to the deepest known part of Earth's ocean.  Former NASA astronaut Kathy Sullivan, 68, completed the expedition to Challenger Deep in the Marianas Trench on Sunday onboard a submersible named Limited Factor, acknowledging the feat by posting the word "Success!" on her blog. The nearly seven-mile trip to the deepest part of the ocean was coordinated by EYOS Expeditions. Victor Vescovo, an explorer funding…