Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		Health & MedicineGenetics may underlie some kidney failure in blacks
Gene variants that offer protection against African sleeping sickness may also put carriers at renal risk, a new study finds.
By Nathan Seppa - 			
			
		Health & MedicineEveryone poops his or her own viruses
The viral denizens of a person’s intestines are unique and don’t change much over time, a study suggests.
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		Health & MedicineBody shape may affect mental acuity
Among women 65 to 79, big apples performed better than plump pears on tests of memory and reasoning.
By Janet Raloff - 			
			
		Health & MedicineAntiaging protein also boosts learning and memory
An antiaging molecule also helps keep the mind sharp.
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		Health & MedicineProteins last longer in the brain
A study in mice could lead to a better understanding of aging, Alzheimer’s and other degenerative processes.
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		Health & MedicineCritics point to flaws in longevity study
BLOG: A study showing a genetic basis for exceptionally long life in humans has come under fire from critics.
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		Health & MedicineNewly discovered antibodies may boost AIDS vaccine research
Inducing production of these potent HIV neutralizers will pose a challenge.
By Nathan Seppa - 			
			
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		Health & MedicineFish oil may fight breast cancer
Other popular dietary supplements fail to show protection, a large study shows.
By Nathan Seppa - 			
			
		EarthAfrica’s bumper crop of dust
Seafloor sediments show that agriculture has greatly boosted airborne dust in the last two centuries.
By Sid Perkins - 			
			
		PsychologyAncient hominids grabbed early northern exposure
Newly recovered stone tools indicate that hominids lived in chilly northwestern Europe more than 800,000 years ago.
By Bruce Bower - 			
			
		Health & MedicineProtein regulator shows promise against addiction
Elevating levels of a tiny molecule in rats’ brains blunted the animals’ cocaine use.