An extinct marsupial lion that once roamed Australia may be the most efficient killer ever known, a study comparing the predator to African lions suggests.
As elephants browse through trees on the African savanna, they create nooks and crannies for geckos to hide from predators and the hot sun, according a new study.
Earlier springs and warmer winters are causing hibernating animals to wake too early or not sleep at all—putting many animals on the path to extinction, researchers say.
The male Anna's hummingbird creates a loud squeak with its tail feathers during rapid dives, according to research that offers the first demonstration of a "new way for a bird to make a sound."
The hairless, finger-size animals' numbness to acidic burning sensations could help scientists in their quest to help humans in pain, a new study says.
An exceptionally well preserved fossil reptile found in Brazil is a likely "missing link" between dino-era crocs and their modern counterparts, experts say.
The newfound species suggests that the marine creatures have existed for at least a hundred million years longer than previously believed, a new study says.
Fish farms currently provide sustainable populations of fish for eating, but fish raised in open-net farms can spread disease and parasites to wild fish.
