Life
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We summarize the week's scientific breakthroughs every Thursday.
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LifeLife on Earth took a licking, kept on ticking
Earth's early organisms may not have had to restart after a long spell of asteroid impacts.
By Sid Perkins -
PaleontologyAncient fish with killer bite
Dunkleosteus clamped down on prey with three-quarters-of-a-ton bite force.
By Sid Perkins -
LifeIt’s not their dirty mouths
Komodo dragons kill prey with venom, not oral bacteria, study suggests.
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LifeFor blood stem cells, the force is strong
Blood flow boosts production of blood stem cells, two new studies show.
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ChemistryHow RNA got started
Scientists identify chemical reactions that could be responsible for the origin of life.
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LifeMisread epigenetic signals play role in leukemia
A genetic mistake causes misinterpretation of epigenetic marks, leading to cancer.
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AnimalsControversial polar bear rule stands
Creature’s plight remains separate from decisions on greenhouse gas emissions.
By Susan Milius -
ArchaeologyBiocides inducing resistance in Lascaux cave’s microbes
Study makes researchers wonder whether they should treat fungus or not.
By Sid Perkins -
LifeSuppress-the-mob gene found in queen termites
Gene may help keep workers from illicit, royalty-threatening reproduction.
By Susan Milius -
AnimalsBasking sharks head south for winter
Satellite-tagging data suggest that basking sharks migrate south to the Caribbean in winter.
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EarthU.S. radiation dose has doubled
New analysis finds radiation-based medical procedures have skyrocketed.
By Janet Raloff