Sharks are a group of cartilaginous fishes widely known for their fearsome predatory nature.
Profile of flatworms, a group of invertebrate animals that includes planarians, tapeworms, and flukes.
Amniotes (Amniota) are a group of tetrapods that includes birds, reptiles, and mammals. There are about 25,000 species of amniotes alive today.
Profile of tetrapods, a group of vertebrates that includes amphibians, reptiles, birds, and mammals.
Bonobos face a precarious future unless they receive better protection throughout their current range, a new study reveals.
Profile of cobras and their relatives, a group of snakes that include mambas, kraits, death adders, sheildnose cobras, whipsnakes, spitting cobras, and many other groups.
Profile of sirenians, also known as sea cows, a group of mammals that includes dugongs and manatees.
Profile of oceanic dolphins, a group of cetaceans that includes dolphins, pilot whales, and killer whales.
It's the stuff of low-budget sci-fi movies: rodents around the globe are growing ever larger at astonishing rates.
Leaf-cutter ants are crafty cultivators. They tend vast gardens of fungus that they harvest to feed their minions.