Breanna Keilar and Boris Sanchez explained why officials investigating the disappearance of Nancy Guthrie do not have the ...

A bizarre fossil called Prototaxites, which was the largest life-form on land 400 million years ago, may have been a completely unknown form of multicellular life, according to a new study.

Robert Kopp: “The United States is not, in fact, the world, and global warming is a global phenomenon. Just because it’s cold where I am … doesn’t mean it’s cold everywhere.” ...

CNN’s Jake Tapper reports.

Sleep Experts Explain Why , People Sometimes Jerk Awake , Just After Falling Asleep. CNN recently spoke with sleep experts about the common experience of falling asleep and suddenly waking with a ...