News
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ChemistrySkin is no barrier to BPA, study shows
The new finding suggests handling store receipts could be a significant source of internal exposure to the hormone-mimicking chemical.
By Janet Raloff -
EarthArctic lake yields climate record
A Siberian drilling project goes to great lengths to capture an ancient climate record in a 3.6 million-year-old crater.
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PhysicsEntanglement loophole closed
A long-distance experiment rejects a challenge to quantum physics.
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TechTrading places
As the pace of financial transactions accelerates, researchers look forward to a time when the only limiting factor is the speed of light.
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SpaceRevealing the galaxy’s dark side
Observations of the Milky Way’s center detect gamma rays characteristic of the universe’s missing mass.
By Ron Cowen -
Health & MedicineThe fingers don’t lie
The brain has at least two copy editors, typing experiments show.
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HumansDeep African roots for toolmaking method
A method for trimming stone-tool edges appeared 75,000 years ago in southern Africa, archaeologists contend, long before previous evidence of the practice.
By Bruce Bower -
SpaceNeutron star breaks mass record
The new heavyweight champion in its stellar class rules out a number of exotic theories.
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Life1000 Genomes pilot a hit with geneticists
The first stage of a project to probe human genetic diversity has found millions of new variations.
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Health & MedicinePancreatic cancer years in the making
A decade elapses from the first cancer-related mutation to tumor formation, and several more years pass until the disease spreads to other organs, a new study finds. The work raises the possibility that a usually deadly malignancy can be treated before it’s too late.
By Nathan Seppa