House backs GOP bill to block EPA rule on tailpipe pollution; slams plan as electric-vehicle mandate

Animal Magnetic Sense Explained by Tiny Protein 'Compasses'Here's Why Cats Are Fussy Eaters But Dogs Will Consume Almost Anything

Ants Respond as a Collective "Superorganism" When They Sense a PredatorFor The First Time, Chimpanzees Have Been Observed Caring For a Disabled InfantOne-Third of The World's Remaining Orangutans Are Now at Risk From Indonesia's Fires

SeaWorld Is Phasing Out The Killer Whale Shows in Its San Diego ParkYes, There's Been an Apparent Increase in Australian Shark Attacks. No, You Don't Need to Panic

Watch: The First Footage Ever of One of The World's Most Elusive Whale Species

Were Wolves Dependent on Humans Long Before They Became Man's Best Friend?Unique Remains of What Could Be The World's Largest Bird Found in Australia

Watch A Great White Become an Orca's Lunch in World-First FootageReconstruction of The First Mammal's Genome Suggests It Had 38 Chromosomes

Dinosaur-Killing Asteroid Produced Global Tsunamis Up to 2.8 Miles HighAfter 50 Years, Scientists Finally Figure Out How Bacteria Actually Move