Researchers have used distinct markers from human subpopulations to trace back to our common African root in a giant human "tree." However, a “trellis” model might be more appropriate.

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

Now researchers have found other megafauna specimens, including giant sloths and camel-like ... then they would have lived side-by-side with humans who arrived in South America sometime between ...

On Tuesday, Humana Inc. (NYSE:HUM) posted a fourth-quarter adjusted EPS loss of $(2.16), down from $(0.11) a year ago, in line with the consensus and including incremental investments in Stars.