As they returned to the airlock, the Earth below started to put on a lightning show, and Ayers took note, mesmerized. A day ...

NASA astronauts Anne McClain and Nichole Ayers emerged around 9 a.m. Thursday, May 1 for the fifth-ever all-female spacewalk.

The video captures them performing an impromptu dance, their movements fluid and playful as they glide through the ISS ...