Smaller than a penny, two newly discovered frog species are considered the smallest ever found. The pipsqueaks live in Papua New Guinea and run about 0.4 inches (8-to-9 millimeters) in length.
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World's smallest frog discovered
Two New Frog Species are World's Smallest
World's smallest frog, Paedophryne amauensis, found in New Guinea
ScienceShot: The Smallest Frog in the Old World, Science
World's Smallest Frog Living in Papua New Guinea Rainforest - Cool
World's smallest frog, Paedophryne amauensis, found in New Guinea
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Tiny frog species among series of finds in Andean 'sky islands
ScienceShot: The Smallest Frog in the Old World, Science