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PhysicsPulling Strings: Stretching proteins can reveal how they fold
Unfolding a single protein by pulling on its ends reveals the molecular forces that make it fold up.
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Forget About It: How the brain suppresses unwanted memories
Two newly discovered neural processes give people the ability to intentionally forget upsetting memories.
By Bruce Bower -
AstronomyShattering Find? Comet fragments show surprising uniformity
Close observations of fragments of a comet indicate that its interior was remarkably similar to its surface, meaning that repeated solar heating didn't much change its outer layers.
By Ron Cowen -
Health & MedicineSmoke This: Parkinson’s is rarer among tobacco users
Life-long smoking cuts the chance of getting Parkinson's disease by about half.