Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		HumansWomen’s chromosome division different from men’s
Using fluorescent markers, scientists are discovering that men and women divide chromosomes differently. The research may help explain Down syndrome and other chromosomal disorders.
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		AgricultureA Mushrooming Advance
Human skin isn't the only thing that makes vitamin D upon exposure to the ultraviolet radiation.
By Janet Raloff - 			
			
		Health & MedicineGender matters in heart transplants
Heart transplant recipients who get a gender-matched organ fare better than those receiving mismatched organs.
By Nathan Seppa - 			
			
		Health & MedicineTreating viral heart infections
Viral heart infections respond to interferon treatment, easing cardiomyopathy in some patients.
By Nathan Seppa - 			
			
		Health & MedicineMini heart attack best treated like the big one
Patients admitted to hospitals with mild symptoms of a heart attack may benefit from getting a heart catheterization performed promptly.
By Nathan Seppa - 			
			
		Health & MedicineItch
When it comes to sensory information detected by the body, pain is king, and itch is the court jester. But that insistent, tingly feeling—satisfied only by a scratch—is anything but funny to the millions of people who suffer from it chronically.
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		HumansFood allergy advice may be peanuts
Early exposure to peanuts in a baby’s diet seems to lessen the risk of developing a peanut allergy later.
By Nathan Seppa - 			
			
		PsychologyA genetic pathway to language disorders
Researchers suspect a newly uncovered regulatory link between two genes contributes to language impairments in a range of developmental disorders.
By Bruce Bower - 			
			
		ChemistryFirst complete cancer genome sequenced
With the entire genome sequence of a tumor now in hand, scientists may be able to start answering basic questions about cancer.
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		Health & MedicineVitamins don’t alter cancer risk
Taking supplemental folate and other B vitamins doesn’t raise or lower the risk of cancer in women.
By Nathan Seppa - 			
			
		ChemistryFrom Aerators to Rust — New Lead Risks
Rusty water and other unusual sources of toxic risks in home drinking water.
By Janet Raloff - 			
			
		ArchaeologyAn ancient healer reborn
A research team in Israel has uncovered one of the oldest known graves of a shaman. The 12,000-year-old grave hosts a woman’s skeleton surrounded by the remains of unusual animals.
By Bruce Bower