News Headlines Article

Scott Kelly grew two inches in space — but NASA is more interested in changes we can’t see
The Washington Post

When astronaut Scott Kelly arrived in Houston on Thursday morning, he was about two inches taller than when he left for the International Space Station a year before, according to NASA representatives. That’s pretty normal for an astronaut: Without the full strength of gravity pressing down on gel-filled discs between the vertebrae, they expand and lengthen the spine. It’s a weird but temporary side effect of spaceflight.

But even if Kelly hadn’t had his vitals checked immediately upon landing, he might have noticed the slight height change: One of the first Earthlings he saw was his identical twin, retired astronaut Mark Kelly – a man now notably, if only temporarily, shorter.