Return to Earth

U.S. astronaut Scott Kelly, back on Earth. Kelly's identical twin brother, fellow NASA astronaut Mark Kelly, has spent the last year on Earth. Because the brothers have the exact same DNA, the twins are giving agency scientists a unique opportunity to examine how living in space affects the human body.

Bill Ingalls / NASA
Copyright © 2017, Los Angeles Times
EDITION: California | U.S. & World
87°