NASA study of twins Mark and Scott Kelly examines biological limits of sending humans to Mars
Wednesday, September 7, 2016 - 05:31
in Astronomy & Space
Dr. Francine Garrett-Bakelman arrived at NASA’s Johnson Space Center in the middle of the night, ready to get her hands on Scott Kelly’s blood. She watched on a laptop as the astronaut stepped off a plane March 2 about 1:30 a.m., back in Houston after his record 340 days aboard the International...