In 1942, Sigmund Rascher and others conducted high-altitude experiments on prisoners at Dachau. Eager to find out how best to save German pilots forced to eject at high altitude, they placed ...

After spending 434 days in space, the crewless Space Force craft returned to Earth on March 7, landing at California's ...

The photographer first took pictures of a person wearing goggles ... Check out even more experiments, including one that shows you how to make a squishy-shelled egg.