Two Amur tigers (Panthera tigris altaica), photographed at the Philadelphia Zoo.
Photo of the Day #616: Amur tigers
Two Amur tigers (Panthera tigris altaica), photographed at the Philadelphia Zoo.
Brian Switek is a freelance science writer and a paleontology volunteer with the Natural History Museum of Utah. He is also author of the books My Beloved Brontosaurus and Written in Stone. ... Read More
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