Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		Health & MedicineEnzyme might underlie some stroke damage
Inhibiting NOX4 in mice limits brain injury, tests show.
By Nathan Seppa - 			
			
		Health & MedicineObesity in children linked to common cold virus
Exposure to adenovirus-36 may partly explain why kids are getting heavier, a new study suggests.
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		TechTo tame traffic, go with the flow
Lights should respond to cars, a study concludes, not the other way around.
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		PsychologyWhy cell phone talkers are annoys-makers
Overhearing half of a conversation is so aggravating at least in part because it inordinately distracts a listener from tasks at hand.
By Bruce Bower - 			
			
		LifeStreetlights turn young duds into studs
Nocturnal illumination starts youthful male blue tits chirping earlier in the morning, tempting the mates of their still-snoozing elders.
By Susan Milius - 			
			
		Health & MedicineScottish kids’ asthma declined after smoking ban
Hospitals report a drop in asthma emergencies among children since a law prohibiting lighting up in public buildings went into effect in 2006.
By Nathan Seppa - 			
			
		LifeEnvironmental DNA modifications tied to obesity
Chemical changes that affect gene activity could underlie many common conditions, a new study suggests.
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		Health & MedicineDNA-damaging disinfection by-products found in pool water
A study detects subtle changes in swimmers’ cells after 40 minutes of laps.
By Janet Raloff - 			
			
		PsychologyVideo mayhem enlivens decision making
People who play action-oriented video games show improved ability to make quick decisions based on what they see and hear.
By Bruce Bower - 			
			
		Health & MedicineDefining normal in the brain
A new growth curve paves way for scans to be used to spot early signs of autism, schizophrenia or other disorders.
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		Health & MedicineA cellular secret to long life
Longevity may depend in part on histones, proteins that keep DNA neatly spooled in the cell’s nucleus and help regulate gene activity.
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		EcosystemsClimate’s link to plague
Scientists have correlated changes in long-term Pacific Ocean temperature patterns with the incidence of a deadly bacterial pestilence, one spread by fleas living on and around mice and other rodents.
By Janet Raloff