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7 Things Most Often Mistaken for UFOs -
7 Things That Create Great Space HoaxesIt doesn't take much to convince people that they've seen an experimental missile or a UFO.
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Robotic Surgeon Attacks Moving TumorsA brain upgrade allows this surgeon to deftly destroy tumors that move while a patient breathes.
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Sahara Desert Was Once Lush and PopulatedJust a few thousand years ago, humans followed monsoon rains to the Sahara Desert and were greeted with lush vegetation and plentiful wildlife.
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Top Predators Key to Ecosystem Survival, Study ShowsThe most feared creatures at the top of a food chain maintain equilibrium, but humans often disturb this delicate balance.
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The Perils of Being Huge: Why Large Creatures Go ExtinctThe fossil record is chock full of big beasts that didn't make it. Find out why, and what lessons can be learned.
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Tips on Saving Earth's Biggest AnimalsAlthough many of Earth's largest animals are endangered, it's not too late to take steps to prevent their demise.
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Hunting 101: Meerkats Teach Scorpion DismembermentActive teaching seems to be rare in the animal world. Perhaps painful stings make for attentive students.
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Tyrannosaurs Suffered Terrible TeensScientists suggest a midlife crisis killed off many of these beasts just as they entered their sexual prime.
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How Spiders 'Fly' Hundreds of MilesThey can travel hundreds of miles by air, but have virtually no say in where they go.
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Big Dinosaurs Were Hot, Study SuggestsThe new theoretical work could help answer how dinosaurs kept warm.
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Ancient U.S. Antelope Migration Route in DangerA 6,000-year-old corridor between Yellowstone and Grand Teton national parks shrinks as developments move in.
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Bird Extinctions More Rapid Than ThoughtA new study suggests the presumed rate of extinction might be severely underestimated.
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One Drink Can Make You Blind DrunkOne stiff drink makes people fail to notice a person in a gorilla suit running across the TV screen.
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Global Warming Alters Departure Times for Migrating BirdsBirds migrating long distances set out earlier than birds traveling less far.
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When Ants Go Marching, They Count Their StepsBy putting some ants on stilts and lopping the legs off others, researchers conclude an internal pedometer is at work.
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Eagle Chicks Allegedly Kill Sibling on Web CamNature's own reality show is getting such high ratings that officials ask viewers to limit their time.
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Weather Makes Earth Wobble
Changes in the daily weather cause small wobbles in the entire planet's spin.
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Exotic Animals Found in Tanzanian MountainsAmong the discoveries: new species of frog, mammals that cry like babies, and 11 species found only in the Rubeho region.
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Oldest Known Spider Web Discovered in Amber
Ancient orb web-weaving spiders might have influenced the evolution of flying insects.
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How Fish Hire a Cleaning ServiceBy spying on their neighbors, client fish enlist the aid of the most trustworthy skin-cleaning fish.
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The Sweatiest Cities in AmericaFor the second year running, Phoenix takes the top place, where residents sweat enough to fill an Olympic-sized swimming pool every three hours.
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The Bizarre Sex Life of an OrchidThis orchid is so reproductively exclusive, it only has sex with itself.
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Cold, Hard Fact: Fish Antifreeze Produced in PancreasOnce thought to be produced by the liver, scientists have tracked the key antifreeze protein to the fish's pancreas.
