Tiny chunks of space debris are believed to have struck the return vehicle of a Chinese crew of astronauts who were due to return to Earth following a mission at the nation's Tiangong space station.

Sometimes, what goes up doesn’t come back down — instead, it becomes a problem. Junk is accumulating in space at a fantastic pace, millions of pieces orbit the Earth, from broken satellites to lost ...

"Some will not change behavior until something bad happens." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Earth is surrounded by human-made ...