Genghis Khan Rode Climate Change
Depth, Distance Minimized Quake
Soyuz Brings ISS Crew Back to Earth
New Blood Test for Alzheimer's?
Keystone Pipeline: Bomb or Boom?
The empire of Genghis Khan of Mongolia, one of the most notorious characters in world history, was helped by a dramatic rise in rainfall and mild temperatures in central Asia in the early 13th century.
One of the largest earthquakes to hit California in decades rattled the state's northern coast, but its depth and distance from shore reduced the impact on land, where there were no injuries.
NASA says a Soyuz capsule carrying a U.S.-Russian crew returning after spending nearly six months on the International Space Station landed safely on the steppes of Kazakhstan.
It may soon be possible to predict who will get Alzheimer's disease at least a few years before the start of symptoms, thanks to a new blood test that measures the levels of 10 particular fats.
Environmental opponents don't mince words on the Keystone XL pipeline. Some call it the "fuse to the biggest carbon bomb on the planet" due to the carbon emissions from the oil it will carry.