The content originally appeared on: CNN A version of this story appeared in CNN's Wonder Theory newsletter. To get it in your inbox, sign up for free here. Tell us what you'd like to see more of in the newsletter at sciencenewsletter@cnn.com. But increasingly, you don't have to be a professional astronaut to go to space (Japanese billionaire Yusaku Maezawa soared into orbit this week) and space agencies are, in some cases, rethinking what astronaut training means. The European Space […]
