Originally built as early as 4000 years ago, this structure is just one of a larger network in the Salisbury Plain that ancient astronaut theorists believe are more than just ritual sites in this clip ...

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

, 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 ...

Scientists suggest that advanced aliens might not have physical bodies, challenging traditional views of extraterrestrial ...