The newest visitor from deep space, interstellar comet 3I/ATLAS, has arrived with a literal pulse that is stirring up talk of alien engineering as much as it is exciting astronomers. As its brightness ...

Interstellar comet 3I/ATLAS has gone from a faint, anonymous smudge in survey data to one of the sharpest imaged visitors ever seen from beyond the solar system. The latest high resolution views are ...