Inside: Fun and unique skeleton crafts and activities your kids will love making. With Halloween coming up in a few days I ...

In 1942, Sigmund Rascher and others conducted high-altitude experiments on prisoners at ... Experimenters also tested various poisons on the human body by secreting noxious chemicals in prisoners ...

About 98% of the atoms in the human body are ... his conclusion on experiments with radioisotopes, which trace the movements of chemical elements in and out of the body. The fastest-changing ...