Researchers in a recent breakthrough study have found the possibility of structures in the Milky Way that could be built by ...

Explore ancient mysteries and theories about alien involvement in ancient civilizations, from the Nazca lines to Puma Punku.

, July 10 -- Scientists searching for signs of intelligent extraterrestrial life say some of the coldest objects in the Milky Way may not be stars at all but massive energy-collecting structures built ...