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How were ancient pyramids constructed? Now we know
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Eta Aquarid, a meteor shower courtesy of Halley's Comet, peaks early Tuesday morning
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Leonardo da Vinci may have secretly created a Mona Lisa in 3D, researchers investigate
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USGS includes fracking triggered tremors to assess earthquake hazards
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Corn yields could fall victim to climate change
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Ganymede, largest moon in the solar system, may possess "club sandwich" of internal ice, ocean layers
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NASA's Cassini snaps a photo of Uranus, a blue orb through Saturn's rings
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Tree rings tell history of extreme droughts in Western U.S.
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Neanderthals not inferior to modern humans in terms of intelligence, social skills: Study
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Carbon dioxide, cause of global warming, hits record high level in atmosphere since existence of mankind
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NASA's Curiosity rover takes selfie on Mars. Don't worry, no duck lips involved.
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Where are you from? Genetic 'sat nav' can trace your ancestors from 1,000 years ago
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