7. Betta Fish Suit Small Aquariums Betta fish are perfect for small aquariums. They can be slightly bigger than some of the species on this list, but they’ll be happy in a five or ten-gallon tank.

Enigmacursor darted around North America in the Late Jurassic 145-150 million years ago and its skeleton is now on display in ...

Paleontologists have identified a new ancient reptile from the Solnhofen limestone slabs, thanks to a chance discovery. A ...

Scientists found a “leaf-toed” creature with “reddish”-gold eyes “wandering” at night in Cambodia and discovered a new ...

Have you ever wondered how city life affects animals like frogs? A new study reveals that urban Túngara frog tadpoles develop ...

The new minnow species, Phoxinus kottelati, is able to change its color pattern during spawning, according to a study. Photo ...

The new species has only been found in one tributary on Enggano Island, located south of Sumatra, a study said.

The northern ocelot is classified as an endangered species. The small cat once roamed the southern U.S., but only a few hundred still exist. Photograph By Joel Sartore, National Geographic, Photo Ark ...

U.S. officials proposed Monday to protect the pangolin, a small, nocturnal mammal covered in scales, under the Endangered Species Act. The pangolin is “the most trafficked mammal in the world ...

The small-bodied hominin, named Homo luzonensis, lived on the island of Luzon at least 50,000 to 67,000 years ago. The hominin—identified from a total of seven teeth and six small bones—hosts ...