Researchers found a rare, strictly binary brain feature in mice that is permanently active in females but completely dormant in adult virgin males, only turning on after males mate. ( ...

McClintock’s study also assumed each boarder had a standard 28-day menstrual cycle. Before the 2000s, this was widely accepted as scientific fact. But multiple landmark studies which used apps to ...

A new study on mayflies of the genus Ecdyonurus illustrates just how multifaceted and surprising reproductive behavior in ...

Across the animal kingdom, sound is more than communication—it's a signal of survival and success. From birds and primates to insects, fish, and amphibians, animals broadcast acoustic "advertisements" ...

A "dominant" crocodile-like predator with a big lump on its head preyed on man's ancestors three million years, ago, according to new research. Early humans - embodied by the iconic hominin Lucy - ...

Sometimes it’s scary to think that the many species we see today might not be around in twenty years. Or, if we don’t focus ...

Scientists say a pair of condors are likely tending to an egg high up in a California redwood — the first time that's happened there in more than a century. A Yurok wildlife official gives an update.

MANATEE COUNTY, Fla. — Largo police have arrested two people on felony animal cruelty charges after 11 sick dogs — including nine puppies — were abandoned in a park. The two suspects arrested by Largo ...

Slugs are sluggish but one of the more fascinating creatures in existence. Learn 10 slippery facts about these gastropods.

This week's Outside Story shows how fishers, normally solitary creatures, ever so briefly meet each other during mating season.

Celebrate National Peacock Month with the Ross Park Zoo’s Feathered Fashion Icons. If you love bold colors and a little bit ...

The animal kingdom is ruled by open sexual relationships. Bats, beetles, and bonobos all have multiple partners over a season ...