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Jul 24, 2014 02:00 PM ET // Jennifer Viegas
Some 322 birds, mammals and reptiles all went extinct in just the past 500 years due to people, research shows.
Feb 7, 2014 10:25 AM ET // Jennifer Viegas
A tiger in India is reportedly eating humans. Experts say it's unlikely it will stop at nine.
Jan 28, 2014 09:26 AM ET
Moths and dung eating insects live on sloths, and they create algae on its body. The algae serves as a camouflage from predators, and also as a tasty snack! Trace hangs out and discusses how you might not want to hold a sloth anymore.
Jan 28, 2014 11:45 AM ET // Kieran Mulvaney
A polar bear mother -- with cubs in tow -- charges a large male feasting on a freshly killed seal.