Feature
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‘Good’ cholesterol may be overrated
Surprise result questions heart protection from HDL.
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Obesity research gets weightier
Findings are filling out the story behind the fat.
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You really can learn while you sleep
Brain stays busy during lights-out.
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Out on a limb
Fossils suggest early bipedal hominids still climbed.
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Milky Way will bite the dust
Eventual collision with Andromeda to shake up the solar system.
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Kissing, and missing, human cousins
DNA paints a contested picture of Stone Age interbreeding.
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Polar bears have seen hard times
Two genetic studies extend the Arctic icon’s lineage way back.
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Quantum hops
A little closer to teleportation and new computers.
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Finding new ways to spell L-I-F-E
XNA molecules join DNA and RNA in the genetic catalog.
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Prions may cause Alzheimer’s
Similarity found with destructive protein behind mad cow.
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Earth’s new neighbor looks familiar
Planet discovered in Alpha Centauri, just a few light-years away.
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