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Fossils Could Force Rethink of Human EvolutionNeanderthals and Homo sapiens might not be the only human species to once coexist.
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Greatest Mysteries: Does Alien Life Exist?Increasingly, signs point to a "yes."
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Russia Claims North Pole in Global Race for OilTwo Russian ships have reached the North Pole and will claim it for their country.
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Dinosaurs' Rise to Dominance Was GradualDinosaurs took several million years to become the dominant land animals.
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Multitaskers Are Born, Not MadeGenes influence whether you can listen to two conversations at once.
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Why We Walk Upright: Beats Being a ChimpChimps use 75 percent more energy walking than humans.
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First Atomic Bomb Test Exposed U.S. Civilians to RadiationAn unaware public might have been exposed to high doses of radiation.
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Deep Volcanic Fizz Forces Earth to BurpThe mild eruptions of some volcanoes are driven by rising air bubbles.
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Songbirds Prefer the Latest TunesFemale sparrows prefer new bird songs over old ones.
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Engineered Virus Attacks BacteriaScientists combine the parts of different viruses to kill bacteria.
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Ancient Greenland Was Actually GreenGreenland was once carpeted in lush forests, a new study shows.
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As City Grows, Rainfall SlowsCovering vegetated land with asphalt reduces the amount of moisture in the atmosphere.
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Breakthrough Could Lead to Artificial Life FormsThe achievement could lead to synthetic organisms created from scratch.
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How Whales Attack Squid: Mystery DeepensStudy busts myth that ultrasound subdues the prey.
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Debate Flares over Whether Circumcision Curbs HIVA new study claims using circumcision to protect against HIV is overrated.
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Thick Layer of Magma Found Under American SouthwestScientists have found a layer of melted rock beneath America’s Southwest.
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Prey Forget to Fear PredatorsPrey animals are not necessarily hard-wired to fear their enemies.
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Study: Circumcision Removes Most Sensitive PartsThe health benefit the surgery confers might be tempered by a loss of the penis’ most receptive regions.
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Origins of Human Nervous System Found in SpongesSea sponges have many of the genes needed to make a nervous system; despite not having any themselves.
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The Surprising Realities of Mythical CreaturesOrigins of some of the world's most famous imaginary beasts traced.
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Letters Reveal Young Darwin Had Stinky FeetMore than 14,700 letters written both by and to the famous naturalist are now available for online reading.
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Fake Snot Makes Electronic Nose Smell BetterArtificial mucus makes electronic sniffers work better and faster.
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Volcanoes Triggered Ancient Warming EventEruptions that sundered Greenland from western Europe set off intense global warming 55 million years ago.
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World's First Tree ReconstructedScientists found bits and pieces of Earth's first known trees in various places, finally learning what they looked like.
