Q. I get different answers on the Internet when I ask what is the rarest animal in the world. What’s the correct answer? A. In the strictest sense, the answer to your question could change daily.

Q. I get different answers on the Internet when I ask what is the rarest animal in the world. What’s the correct answer? A. In the strictest sense, the answer to your question could change daily.

Often called the Asian unicorn, little is known about the enigmatic saola in the two decades since its discovery. None exist in captivity and this rarely-seen mammal is already critically endangered.© ...

Across dense forests, deep oceans, and remote mountain ranges, there are creatures so elusive that even scientists may go ...