A poison dart frog from Peru that mimics its neighbors in incredible detail is evolving into a new species, scientists believe.
A new species of bright-orange, fingernail-size frog found in a Panama rain forest is unlike any of its relatives, scientists say.
Bigger males may get a lot of attention, but sometimes being smaller and having a different strategy is more successful when it comes to mating.
The impressive array of male weaponry—from horns to antlers to claws—evolved from individual species’ combat styles, a new study says.
Researchers discover four new species of frog in the Peruvian Andes, three of which are see-through.
A golden bat recently discovered in Bolivia has joined the ranks of nature’s richly gilded creatures.
In the first identified case of “killer sperm,” females that mate with males of another species can become sterile or even die, a new study says.
The yeti, Bigfoot, and their kind are literally a load of bull—plus several other mammals, according to the first peer-reviewed scientific study of the shaggy humanoid creatures.
In honor of National Pollinator Week, we delve into the strange, colorful world of the creatures that keep our planet blooming.
A new species of frog with some bizarre mating rituals has been discovered in India, a new study says.
The spectacular haul more than doubles the number of Indian dancing frogs, a family named for the bizarre courtship displays of their foot-waving males.
Men stress out rodents—and probably most other mammals, including furry pets—with the whiff of their armpit sweat, a new study says.
Canine researcher Ádám Miklósi of the Family Dog Project gets us into the head of the family pooch—and how that could help us learn about our own brains.
Scientists report the “exceptional traumatic mating behavior” of a mysterious sea slug that gets intimate by inserting a hypodermic needle between the eyes of its mate.