All Stories
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HumansRedefining ‘concern’ over lead
The Centers for Disease Control and Prevention announced May 16 that it would no longer designate any particular blood-lead value in children as representing a “level of concern.” Its justification: There is no threshold below which lead exposures are not a concern.
By Janet Raloff -
ChemistryDancing droplets reveal physics at work
Magnetic fields can deflect liquid oxygen subject to the unusual “Leidenfrost effect.”
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Health & MedicineCoffee gives jolt to life span
Unlike wine's, coffee's benefits apparently keep increasing well beyond the first two servings.
By Nathan Seppa -
SpaceStellar superflares’ trigger challenged
Massive eruptions on sunlike stars might not require magnetic interactions from a big, hot, nearby planet.
By Nadia Drake -
HumansDon’t listen to advice, and other advice from Nobel laureates
Top scientists share stories and words of wisdom with finalists at the Intel International Science and Engineering Fair.
By Devin Powell -
TechParalyzed woman grips, sips coffee with robot arm
For the first time, a brain-computer interface is powerful enough to enable useful movement in human patients.
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HumansAt ISEF, fusion is hot
A South Carolina teen makes the finals of the 2012 Intel International Science and Engineering Fair by developing a directed neutron source.
By Devin Powell -
EarthNatural sinks still sopping up carbon
Ecosystems haven’t yet maxed out their ability to absorb fossil fuel emissions, new calculations suggest.
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Health & MedicineEven moderate noise may harm hearing
Chronic, low-level sound exposure causes deficits in rats.
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Schizophrenia’s core genetic features proposed
Researchers may be closing in on the inherited component of a disease whose causes have been difficult to establish.