The vaquita is the rarest animal in the world and the rarest marine mammal. These porpoises swim in the Gulf of California and were only discovered in 1958, according to the World Wildlife Fund. They ...

We have the biggest species of chameleon in the world called ... a representation of a whole animal, The more genes you include, usually the better. You can even get the entire DNA sequence ...

Unlike many fish, this bizarre animal, which lives on the seabed ... "The red handfish is probably in the rarest 'handful' of fish in the world, no pun intended," Trotter said.

Mana whenua and scientists are examining the rarest whale in the world for the first time ever. As van Helden tells Eva Corlett of the Guardian, “We’re working around a dead animal ...

The entire world’s population of Przewalski’s horses ... Daniel Brenner for The New York Times Supported by By Sarah Maslin Nir The animal that arrived at Hannah Huckabay’s barn this past ...