By Jessica Eagan
International Space Station Program Science Office
NASA’s Marshall Space Flight Center
Riddle: It’s the size of a small microwave, and it may alleviate the need for NASA astronauts to wait for resupply ships to arrive at the International Space Station to get some essential items.
Answer: A 3-D printer — the first ever to be flown to space. And it could change the way NASA does business aboard the space station.