Ocean acidification could alter the behavior of fish and make them more anxious, a new study says.
A 400,000-year-old thigh bone from an early European human is causing confusion among genetic anthropologists who say its genetic material is related to another mysterious species believed to have lived only in East Asia.
A massive planet found orbiting a star at a staggeringly great distance is smashing some long-held theories of planetary formation, researchers say.
Ever have that awkward talk with a romantic partner about your sexual history -- about how old you were when you lost your virginity and how many people you've had sex with? Did you tell the truth?