Animals
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'Rapture cloud' spotted in Australia not a UFO or wormhole: It's a fallstreak hole
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New fossil is missing link in ichthyosaur evolution
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Hummingbirds aren't the only birds that know how to get aggressive: A look at angry birds
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Male hummingbirds use beaks to duel with each other over lady love
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Is String Theory the basis for quantum mechanics? Here's the answer... in English
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Australians spot extraordinary cloud formation. UFO or just... clouds?
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Hummingbirds seem sweet, but they fight dirty
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90-million-year-old turtle fossil discovered in New Mexico: Evidence found in once-swampy desert
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Why was animal evolution so delayed? Earth was low on oxygen
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Rover disguised as baby penguin helps scientists study lives of shy Emperor Penguins
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Deadly salamander-killing fungus may hit stateside, new study warns
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How old is Earth's water? You'll be surprised
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