3I/ATLAS Mystery: Why Harvard Scientist Fears Humanity Is Unprepared For Alien Invasion

Harvard's Avi Loeb warns interstellar comet 3I/ATLAS could be alien tech. Experts weigh in on planetary defence and the risks ...

Could Earth handle an alien encounter?

Alien spaceships are in a league of their own, though. Earth does have a force field that could make a spacecraft landing ...