Hints of ancient microbes in Martian rocks and a revived theory about our cosmic ancestry are forcing scientists to rethink ...

A recently circulated photo from NASA’s Mars Perseverance rover has sparked renewed fascination with interstellar comet 3I/ATLAS. The striking image appears to show a bright, cylindrical object moving ...

A comet that is likely much, much older than our solar system has spent months traipsing through Earth's cosmic neighborhood. And at long last, NASA has unveiled an unprecedented look at the object, ...

The True Story of an Alien Craze that Captured Turn of the Century America," David Baron looked into one source of that ...