Humans
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We summarize the week's scientific breakthroughs every Thursday.
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		LifeBody’s clock linked to depression
Gene activity in the brain suggests that circadian rhythms are off-kilter in people with depression.
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		HumansEruption early in human prehistory may have been more whimper than bang
If Hollywood’s right, the apocalypse will be brutal. Aliens, nuclear war, zombies, plague, enslavement by supersmart robots — none of them are good endings. Some archaeologists, however, believe an apocalypse has already come and gone. About 75,000 years ago, they say, a monster volcanic eruption nearly wiped out humankind, leaving behind only a few thousand people to […]
By Erin Wayman - 			
			
		LifeGut bacteria adapt to life in bladder
E. coli moving between systems may cause urinary tract infections.
By Meghan Rosen - 			
			
		PsychologyBrain training technique gets a critique
In a new study, a popular style of memory workout leaves reasoning and mental agility flat.
By Bruce Bower - 			
			
		Health & MedicineBlack women may have highest multiple sclerosis rates
Large study counters common assumption that whites get MS more.
By Nathan Seppa - 			
			
		HumansEurope is one big family
Continent's ancestry merges about 30 generations ago, genetic study finds
By Meghan Rosen - 			
			
		Health & MedicineHighlights from the Pediatric Academic Societies meeting
Highlights from the pediatrics meeting held May 4-7 in Washington, D.C., include adolescent suicide risk and access to guns, a reason to let preemies get more umbilical cord blood and teens' cognitive dissonance on football concussions.
By Nathan Seppa - 			
			
		HumansGreed may breed financial fitness, but evolution allows unselfishness to survive
If greed is good, as Gordon Gekko proclaimed in the 1987 movie Wall Street, then economics ought to be a superlative science. After all, at the core of economic theory sits a greedy idealization of human nature known as Homo economicus. It’s a fictitious species that represents the individual economic agent, motivated by selfishness. H. […]
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		AnthropologyPaleofantasy
What Evolution Really Tells Us about Sex, Diet, and How We Live by Marlene Zuk.
By Erin Wayman - 			
			
		HumansHuman ancestors had taste for meat, brains
A mix of hunting and scavenging fed carnivorous cravings of early Homo species.
By Bruce Bower