https://ift.tt/2wwdHAe First American Woman to Walk in Space Reaches Deepest Spot in the Ocean Oceans and Seas, Submarines and Submersibles, Space and Astronomy The astronaut Kathy Sullivan, 68, is now also the first woman to reach the Challenger Deep, about seven miles below the ocean’s surface. BY HEATHER MURPHY https://ift.tt/3hi3NWq June 9, 2020 at 05:31AM