It was Carl Sagan who used to say, "Extraordinary claims require extraordinary evidence." That adage now looms over the world of astronomy as Harvard astrophysicist Avi Loeb puts forward a bold ...

I/ATLAS has captured the attention of astronomers—and the public’s fascination—as new clues about its mysterious nature are ...

Harvard scientist Avi Loeb earnestly hopes that the interstellar alien object in the solar system turns out to be a spacecraft sent by extraterrestrial beings. This comes after his very open assertion ...

In June, scientists spotted an odd object hurtling toward our solar system. 3I/ATLAS is likely the size of Manhattan. Unlike ...