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We summarize the week's scientific breakthroughs every Thursday.
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		AnimalsBuilt for Speed
Animals would prove fierce competitors at the Olympics — if only they would stay in their lanes.
By Susan Milius - 			
			
		Health & MedicineNeuron Killers
Misfolded, clumping proteins evade conviction, but they remain prime suspects in neurodegenerative diseases.
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		LifeFish lie
No, really. I like the other girl better. Really. Science reveals a fish dating scene worse than junior high school.
By Susan Milius - 			
			
		LifeHow the snake got its fangs
A study of snake embryos suggests that fangs evolved once, then moved around in the head to give today’s snakes a variety of bites.
By Amy Maxmen - 			
			
		Health & MedicineCalcium’s possible role in Alzheimer’s
A new study in mice finds that plaques associated with Alzheimer’s wreak havoc on calcium’s role in cell signaling.
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		PaleontologySoft tissue in fossils still mysterious
New research suggests modern biofilms could contaminate ancient fossils.
By Sid Perkins - 			
			
		LifeNature’s chronic boozers
Tree shrews pub-crawl nightly from flower to flower for fermented palm nectar.
By Susan Milius - 			
			
		EcosystemsNomadic ants hunt mushrooms
A species of ants not well understood surprises researchers with a nomadic lifestyle, roaming the rainforest on fungal forays.
By Susan Milius - 			
			
		EcosystemsFish Houses
Tanked half-way houses allow people and fish to get acquainted on their own terms — and exhibit their individual personalities.
By Janet Raloff - 			
			
		Health & MedicineProtein links metabolism and circadian rhythms
Scientists have known for ages that metabolism is tied to the body’s daily rhythms. Two new studies suggest how.
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		LifeChoose your own splicer
Zinc-finger proteins can cut, splice or tweak a targeted gene, and a new “open source” method for making customized zinc-finger proteins aimed at specific genes will give scientists easier access to this powerful genetic tool.
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		PlantsFugitives spread bumblebee diseases
Pathogens hitchhike on commercial bees that escape from greenhouses. These escapees bring disease to wild bumblebees.
By Susan Milius