Astronomer and Harvard Professor Avi Loeb makes the assertion in his new book, 'Extraterrestrial'
Astronomer and Harvard Professor Avi Loeb makes the assertion in his new book, 'Extraterrestrial'
Astronomers at MIT, the University of Liège in Belgium, and elsewhere have discovered a huge, fluffy oddball of a planet orbiting..
A Harvard astrophysicist says our solar system was visited by a piece of extraterrestrial technology or debris from a distant alien..