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Ancient Warming May Have Reunited Polar and Brown Bears, for a BitFluctuations in climate may have prompted the two species to interbreed after they separated.
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Many Countries Failing to Prevent Illegal Wildlife Trade: WWF ReportThe report assesses nations' performance preventing the illegal wildlife trade.
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Caffeine Pollution Found in Oregon Coast WatersA study turned up elevated levels of caffeine along Oregon's coast, but not in the most likely places.
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Sexually Transmitted Bacteria Become 1st Complete 'Virtual Organism'A small-genomed, STD-causing bacterium has been simulated using a computer.
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Greenhouse Gas Emissions Continue to Climb in 2011Developing nations, particularly India and China, drove 2011's increase in carbon dioxide.
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Generation X Is Lukewarm On Global WarmingGen Xers have even become slight more disengaged recently.
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Could Fertilizing the Oceans Reduce Global Warming?An experiment confirms the idea has some promise, but many questions remain.
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How Bad Is the US Drought?The drought wrecking havoc with agriculture has been declared a natural disaster.
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Thieving Rodents Explain Tree Survival MysteryTropical rodents’ habit of stealing from one another may explain how certain trees have survived.
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June 2012 Ranks As Fourth Warmest on Record for PlanetLast month's global average temperature was the fourth highest on record since 1880, according to U.S. weather records.
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Too Much TV at Age 2 May Cut Athletic Ability Later OnThe more TV young kids watched, the less fit they were later in grade school, a study found.
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Climate Change Could Melt Wolverines' Snowy 'Refrigerators'The animals' need for snow makes them vulnerable to climate change.
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Batman on the Couch: Psychologist Analyzes Comic Book CharacterHe dresses like a bat, fights crime vigilante style and lives a lonely life. Is Batman mentally ill?
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Holy Therapist! 5 Signs Batman May Be Mental
He dresses like a bat, fights crime vigilante style and is supported by his wealthy alter ego. Is Batman mentally ill?
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Human Ancestor Fossils Hidden in Plain Sight in Lab RockNew remains from a human ancestor, whose place in the family tree is disputed, have been found.
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Identity of First Americans QuestionedStone projectile points indicate that the Clovis culture was alone in ancient North America.
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Why a Meal Can Spark Romantic JealousyFor the excluded romantic partner, lunch is not "just lunch," researchers say.
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Healing Powers of Birds' Nest Soup Remain MysteriousBirds' nest soup is believed to have curative powers, but its biological effects are still poorly understood.
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Male Ego Takes Hit from Muscle-y Music VideosMen, like women, appear affected by seeing idealized bodies in music videos.
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Lighting May Reduce Fatal Airplane-Bird CollisionsCould understanding how birds see and respond to aircraft may help prevent fatal collisions?
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US Heat Wave: First Half of Year Hottest on RecordLast month brought more unusual warmth, and weather records, to the continental U.S.
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Excess Pounds Won't Kill You, Study Suggestsoverweight or obese does not increase your risk of dying, a study finds.
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Math Makes Girls More Anxious Than BoysGirls suffered from more "mathematics anxiety" than boys in an English study.
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Tiny Tyrannosaur's Mysterious Origins Divide ScientistsThe mysterious origin of the fossils leaves debate about just what they are unresolved.
