A fossilized brain from a 500-million-year-old sea creature shows unexpected spider-like features, hinting that spiders and their kin may have evolved in the ocean—not on land.

Betelgeuse companion discovery with Gemini North resolves century-old mystery and opens new doors in red supergiant research ...

Astronomers directly imaged a faint companion star orbiting Betelgeuse, solving a decades-old mystery about its strange brightness changes.