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LifeEarly RNA may have used isolation strategy to defeat useless mutants
Temporary barriers help RNA escape shorter, faster-replicating parasites
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Health & MedicineOldest traces of smallpox virus found in child mummy
The oldest genetic evidence of smallpox comes from variola virus DNA found in a child mummy buried in a church crypt in Lithuania.
By Meghan Rosen -
AnimalsWhy crested penguins lay mismatched eggs
After long migratory swims, crested penguins lay one small and one larger egg.
By Susan Milius -
EarthThird kind of quasicrystal found in Russian meteorite
A new quasicrystal found inside a Russian meteorite is the first ever found in nature before being synthesized in the lab.