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why does february have just 28 days, anyway?

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what does it mean when someone says "there is no such thing as cold"?

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science explains why beer is the liquid that fuels civilzation

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this is awesome

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how do our bodies know left from right?

developmental biology

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the universe is a pretty violent place

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how does science define a year?

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what happens when a boeing 777 tries to land in a major crosswind

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new "comedy" video shows einstein sexually assaulting marie curie

阿尔伯特·爱因斯坦

famous scientists

history of science

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pbs digital studios

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our ability to pay close attention is both a blessing and a curse

attention deficit disorder

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