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  What the new nutrition guidelines get wrong about fat

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  The brain’s response to a heart attack may worsen recovery

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  Spider silk-making organs evolved due to a 400-million-year-old genetic oops

  An ancient ancestor of spiders and relatives doubled its genome about 400 million years...

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  This ancient stick may be the world’s oldest handheld wooden tool

  These 430,000-year-old wooden tools from Greece are a rare find and provide a glimpse...