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Quantum PhysicsQuantum tunneling takes time, new study shows
A new measurement disfavors the idea that electrons can escape atoms instantaneously.
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Health & MedicineMost football players who donated their brains to science had traumatic injury
A self-selected sample of 202 deceased football players, the largest to date, finds that the majority suffered from chronic traumatic encephalopathy.
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Health & MedicineAdd penis bacteria to the list of HIV risk factors
Certain bacteria found on the penis raise the risk of HIV infection, a new study finds.
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EarthHow earthquake scientists eavesdrop on North Korea’s nuclear blasts
Researchers monitor the power and location of underground nuclear weapons testing by North Korea.