National Geographic Why This Frog’s Poisonous, Inflatable Backside Is Staring at You 2018-05-26T11:00:00.000000000+00:00 This South American frog’s inflatable rear end puts on quite a show for predators. What You Think You Know About Animals? Probably Not True 2018-05-26T04:01:00.000000000+00:00 Unfaithful penguins, blood-red hippos, and randy pandas: In the wild, animals are not always how we imagine them. Oldest European Tree Found—And It's Having a Growth Spurt 2018-05-25T09:15:07.000000000+00:00 A Heldreich's pine discovered in southern Italy has been thriving in a remote part of a national park for 1,230 years. These Birds Make Their Own Citrus-Scented Cologne 2018-05-25T09:00:00.000000000+00:00 The sexiest male crested auklets have large head feathers and a strong tangerine smell, a new study finds. From Historic to Cutting Edge: Revitalizing Iconic Buildings 2018-05-25T09:00:00.000000000+00:00 Fenway Park, the Eiffel Tower, Empire State, and other storied buildings were upgraded for 21st-century energy efficiency. Tick Wrapped in Spider Silk Found Trapped in Amber—A First 2018-05-25T09:00:00.000000000+00:00 The unlucky creature is now a boon to scientists studying the evolution of arachnid behavior. These Famous Women Artists Changed the World With Their Self-Portraits 2018-05-24T21:37:06.000000000+00:00 These deeply personal self-portraits did more than just mirror the artists—they sparked meaningful social conversations. Bald Eagle Steals Dinner From Fox—by Flying Off With Both 2018-05-24T19:57:29.000000000+00:00 Benjamin Franklin famously criticized the bald eagle for stealing food from other animals. Baby Sloth Reunited With Mom in Moving Video 2018-05-24T16:27:53.000000000+00:00 Found alone on a Costa Rican beach, the infant was returned to its mother thanks to a creative technique by wildlife rescuers. Why Blue Flames Are Now Burning at Kilauea 2018-05-24T15:53:29.000000000+00:00 Methane trapped underground is igniting blue flames near the volcano's lava flows. Experts say methane blasts are possible.