Space travel may accelerate the aging of stem cells by as much as 10 foldPublished 18 hours ago This article appears to have no content available. You can try returning to the homepage to browse other articles. Read original articleRelated from feeds.nbcnews.com2 hours ago$1.8 billion Powerball drawing turns up winners in Texas and Missouri6 hours agoCliff Diving World Series champion crowned8 hours agoProtests over President Trump’s push into cities8 hours agoSouth Korea responds to Hyundai immigration raid8 hours agoD.C. rallies in protest of Trump's federal troops9 hours agoSen. Durbin calls Trump post about Chicago 'disgusting'