Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping argues as much, and his “Eschatian Hypothesis” reimagines the way ...

One night in 1957, Antônio Vilas Boas was plowing his field in rural Brazil when he saw mysterious red lights flying through the sky. What he presumed was a spacecraft landed in a nearby field.

Here’s what you’ll learn when you read this story: Object 3I/ATLAS is now too far from Earth to aim a telescope at, but prior observations showed some unusual behavior. The anomalous nature of the ...