Ghost lineages reveal themselves through ancient genes that still exist in living beings today.

Fragments of DNA from long-extinct human relatives still circulate in modern genomes, and in some cases they do more than ...

Ghost stories have been around as long as there have been stories themselves. The idea of apparitions from the spirit world goes back to the very beginnings of written history, and probably even ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. CAPE CANAVERAL, Fla. (AP) — A private lunar ...