For much of his career, Loeb has been a powerhouse of a cosmologist, churning out hundreds of papers on black holes, dark matter, and the first stars. But he has been captivated by the search for aliens since an interstellar object named Oumuamua zoomed by our planet in 2017. Here's what his latest claims are
The Harvard astrophysicist says that material recovered from the seafloor could be from an extraterrestrial spacecraft. His peers aren’t shy about their skepticism.