Dinosaurs may have ruled Earth for over 160 million years because the way they walked gave them a big advantage during the drying climate of the Triassic.
Przewalski horses cloned from a stallion that died in 1998 could help reintroduce much needed diversity to the species that was once declared extinct in the wild.
Pink fairy armadillos, which are just 6 inches long, appear to have evolved a strange double skin millions of years ago as they moved underground in response to the climate becoming more arid.
Aggressive little male fish from Indonesia turn black when angry to show their dominance, scientists discover.
Ocean pout live in frigid waters from Labrador in Canada to North Carolina and have evolved a blood protein that serves as antifreeze.
Scientists have worked out how Japanese green syllids grow a butt with a brain that can swim away to reproduce.
Scientists have discovered a never-before-seen hydrothermal vent teeming with life off the Galápagos Islands by following a long trail of squat lobsters.
Elephants in Kenya's Amboseli National Park appear to call to each other with individual names using low, complex "rumbles," a study has found.
Scientists have discovered something strange happened to starfish over the course of their evolution, and they ended up as heads scampering around the seafloor.
Research on whether animals can recognize themselves in the mirror began in 1970 1 and just a handful of species have since passed the test ever since.
An 8-year-old girl discovered the bones of a woolly mammoth and a prehistoric bison after a landslide along the banks of a river in western Russia.
The extra legs caterpillars have appear have origins in the primitive crustaceans that insects evolved from during the Ordovician period over 400 million years ago.
These weird-looking stocky mammals roam Alpine zones and forested valleys in Asia, using their specially adapted split hooves help them traverse the steep, rocky terrain.
In the 1990s, a group of juvenile bull sharks were left stranded in a golf course pond in Australia, where they thrived for decades. Now scientists are trying to understand why.
Crocodiles appeared to rescue a dog that had been chased into a river, and scientists said this unusual behavior could indicate empathy — but others are skeptical.
The Wollemi pine was thought to have gone extinct 2 million years ago until it was rediscovered by a group of hikers in 1994. Now, scientists have decoded its genome to understand how it's survived — almost unchanged — since the time of the dinosaurs.
Many tortoise beetle larvae create shields for themselves using faeces and old skin. Scientists have now looked at how and why they create these poop parasols.
Ice-age humans may have set fires that led to the extinction of large mammals across what is now Southern California.
The footage from a camera trap in Yasuní Biosphere Reserve in eastern Ecuador appears to be the first time a fight between a sloth and an ocelot has been caught on film.