A couple of thousand years before the Egyptians preserved some of their dead, a much simpler society made the first known mummies.
The Chinchorros, the first mummy makers, lived about 7,000 years ago in South America, on the coast near the border between modern-day Peru and Chile. The desert area where they lived was so dry, dead people turned into mummies naturally.
In light of this summer's record high temperatures, we find perspective on really hot temperatures. In an experiment, scientists at Europe's CERN laboratory claim to have achieved the highest temperature ever produced by humans — about 5.5 trillion degrees. Audie Cornish and Melissa Block have more.
Imagine a machine that could disinfect your toothbrush or clean a skin laceration in a matter of seconds—without using any liquid disinfectants or heat. It’s not a reality yet, but researchers at the University of Colorado in Denver are getting close.