According to one app for nature observers, it's the most commonly seen creature in California: the western fence lizard. Why?

And our attention will be full captivated starting May 22 when "Living Seas" opens at the Birch Aquarium in La Jolla. Get top ...

Four critically-endangered Western Santa Cruz Galapagos tortoise babies made their debut at the Philadelphia Zoo on Wednesday ...

The zoo's dusty Congo Falls site is still under construction, but will soon be home to a troop of eight gorillas.