Avi Loeb’s single-minded search for extraterrestrial life has made him the most famous practicing astronomer in the country — and possibly the most controversial.
The Harvard astrophysicist says that material recovered from the seafloor could be from an extraterrestrial spacecraft. His peers aren’t shy about their skepticism.
The U.S. Space Command seemed to confirm a claim that a meteor from outside the solar system had entered Earth’s atmosphere, but other scientists and NASA are still not convinced.