Scientists are working a "drop test" on antimatter to see how gravity affects it. It's unlikely that antimatter, which has an opposite charge and spin, though the same mass as matter, will "fall" upward. But Joel Fajans, a physics professor at the University of California at Berkeley and researcher on CERN's Antihydrogen Laser Physics Apparatus experiment, said it's worth a try. "There are some mysteries out there that gravitational anomalies with antimatter might explain," Fajans said.

Related Summaries