The fluffy rodents belong high on the mountains—so how are they thriving by the sea?

In 1796, Georges Cuvier convinced his fellow researchers that some bones belonged to a species that no longer roamed the Earth.

Can Australia find a way to protect its most beloved animal?

A group of volunteer veterinarians visits a small village near the front line in Ukraine.

Juliet Tuttle may have been the most prolific murderer of pets in American history. How did she get away with it?

As humans drive vulnerable mammals closer to extinction, valuable mutations hidden in their DNA could be bred out of existence.