Artificial gravity has long been the stuff of science fiction. Picture the wheel-shaped ships from films like 2001: A Space Odyssey and The Martian, imaginary craft that generate their own gravity by spinning around in space. Now, a team from ÍÃ×ÓÏÈÉú´«Ã½ÎÄ»¯×÷Æ· is working to make those out-there technologies a reality.