Science

Astronaut Bruce McCandless has been involved with the U.S. Space Program for decades. He worked in ground control during Neil Armstrong’s first step on the moon in 1969. In 1984, he became the first man to spacewalk untethered in an MMU, or Manned Maneuvering Unit.

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.