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 ...
Comet 3I/ATLAS has already puzzled astronomers with its odd trajectory, twin tails and sudden bursts of activity. Now a rhythmic 16.16-hour “heartbeat” has become the latest mystery. Most researchers ...