Houston, we have a problem. Astronauts on the International Space Station said Thursday they have found that their craft is leaking coolant.
The good news is that NASA says the leak doesn't pose any immediate danger to the crew, but they are looking into the problem.
This isn't the first time the space station has had this problem. A minor leak was spotted in 2007 and then in 2012 two astronauts took a space walk to fix the problem. Now, however, the leak appears to be back after astronauts noticed a steady stream of frozen ammonia flakes coming out of the craft.