The discovery of teensy baby dinosaur bones and teeth in the Alaskan Arctic reveals that dinosaurs nested and incubated their eggs there 70 million years ago.
Tasmanian devils introduced to Maria Island for their own conservation have created an ecological disaster in their new home by wiping out an entire population of little penguins.
American black bears are the smallest and most common bear in North America. They are highly adaptable, with a diet that includes honey and moose.
Venomous spiders prey upon snakes many times their size, a new study finds — and often emerge victorious against snakes as venomous as they are.
From the Goliath birdeater tarantula to black widows, spiders are not shy around deadly snakes, often taking down the juveniles and feasting on their meaty bodies for days.
Paleontologists in China found the skull, jaw and a few vertebrae belonging to one of the largest land mammals that ever lived.
A detailed look at coelacanths' scales reveals that this ancient lineage of fish may live to be 100 years old.
A tiny amber-locked skull that looks like a bird's is actually a lizard's, new fossil evidence shows.
Gold miners have discovered three partial skeletons of three woolly mammoths , which may have been part of the same family.
The tiny caterpillars have thin poisonous hairs that can cause poison-ivy-like rashes and breathing problems in some people.
Cottonmouths, or water moccasins, are venomous snakes in North America that display white mouths when threatened.
Scientists have finally solved a longstanding mystery surrounding the bizarre 4-headed penises of echidnas using CT scans.
Scientists from the Wildlife Conservation Society are trying to help wolverines find a new foothold in the rugged terrain of the Colorado Rockies.