There is a lot of plastic trash floating in the Pacific Ocean, but claims that the "Great Garbage Patch" between California and Japan is twice the size of Texas are grossly exaggerated, according to an analysis by an Oregon State University scientist.

When vaccinating children against varicella (chicken pox), researchers at Yale School of Medicine have found, two doses are better than one. In fact, the odds of developing chicken pox were 95 percent lower in children who had received two doses of the vaccine compared with those who had received only one dose.

Long before the knights of medieval Europe wielded flails or martial artists brandished nunchucks, it appears that a flightless prehistoric bird used its own wings as a similar type of weapon in combat.

The epic ocean-spanning journeys of the gigantic leatherback turtle in the South Atlantic have been revealed for the first time thanks to groundbreaking research using satellite tracking.