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Dome-Headed Dinos Battled With Their HeadsSigns of injuries detected in pachycephalosaurs' skulls offer evidence the animals head-butted in violent battles.
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Bats Think About Sex -- A LotBats, like Batman, successfully combine work with courting sexy potential mates.
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Sharks Get Worry-Free SuntansSharks' skin turns to black when exposed to the sun's rays. But the animals don't get skin disease.
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Track Sea-Swimming Sharks in Real-TimeReal-time information about basking sharks swimming off the coast of Scotland is now available online.
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Fossils of New Shark Species Found in ArizonaThe remains of several new toothy shark species, with at least three dating to 270 million years ago, are found in the desert state.
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Presenting the World's Slowest SharkThe Greenland shark is no Ryan Lochte — thanks to frigid waters, this shark swims at top speeds of only 1.7 miles per hour.
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Shark Paradise DiscoveredThere's one place where sharks rule, living out their lives in tropical splendor in a shallow, blue bay.
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500 Million-Year-Old 'Mistake' Led to HumansA spineless creature experienced two doublings in DNA, triggering the evolution of humans and other animals.
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Should We Have Cloned Lonesome George?The death of the tortoise raises the question -- how can we save our endangered animals before it's too late?
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Do Dogs Really Like to Surf?Does man's best friend really enjoy a ride on a surfboard or are they terrified?
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First Terrestrial Animals Shuffled Onto LandWhen creatures made their way onto land for the first time, it wasn't pretty.
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Quake Reveals Day of Jesus' CrucifixionIt's been debated for years, but researchers say they now have a definitive date of the crucifixion.
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Humans Still Eating HumansThe three people suspected of making empanadas out of human flesh are not the only cannibals out there.
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Young Mammoth Likely Butchered by HumansThe carcass of the juvenile "Yuka" may have been cut up, eaten and then buried by ancient people.
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Neanderthals Were Dying Out Before Humans ArrivedCold weather, not cold-hearted humans, may have caused the species' demise.
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Why Are So Many Dolphins Beaching Themselves?Experts grapple with the question, as unprecedented numbers of dolphins wash ashore.
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Lions Live in Constant FearFear of humans is now a key factor that drives lion behavior.
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Dogs Understand Us Better Than Chimps DoDogs may have a special adaptation to be sensitive to human communication.
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How Dinosaurs Grew So HugeBirdlike lungs and other factors may have allowed dinosaurs to grow to soaring heights.
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Why Some Animals Are Fatter Than OthersThe perfect weight gives each animal the best chances of survival.
