Life
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We summarize the week's scientific breakthroughs every Thursday.
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		LifeBlog: Arsenic-based life gets even more toxic
With a pair of new papers, scientists have driven two more stakes through the heart of a controversial research finding that its authors won’t let die.
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		PaleontologyNot your typical pterosaur
A beautifully preserved fossil from Germany displays a wing unlike any ever seen.
By Janet Raloff - 			
			
		LifeTrout nose cells follow magnetic fields
Iron-rich tissue may be at root of a biological compass.
By Devin Powell - 			
			
		LifeEgg production after birth questioned
A study finds no evidence of stem cells in adult mouse ovaries, suggesting female mammals really are born with all the gametes they’ll ever have.
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		MicrobesKilling with the flip of a switch
A single genetic transformation turns mild-mannered bacteria into assassins.
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		HumansWarning to bats: Cuddle not
Ecologist Kate Langwig of Boston University and her colleagues want Eastern bats to listen up: No more cuddling — at least during hibernation. Just keep those wings to yourselves.
By Janet Raloff - 			
			
		LifeSpace trek may help worms live long
After 11 days in orbit, nematodes showed signs of slower aging.
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		LifeAll dinosaurs may have had feathers
Well-preserved fossil sports long, fine plumage and a bushy tail.
By Meghan Rosen - 			
			
		AnimalsClimate adaptation may be a family affair
Newborn coral reef fish can cope with changed water conditions if their parents have already adjusted.
By Janet Raloff - 			
			
		AnimalsMosquitoes Remade
Scientists reinvent agents of illness to become allies in fight against disease.
By Susan Milius - 			
			
		GeneticsConvenience shoulders tomato taste aside
Decades of breeding for uniform color in unripe fruit may accidentally have reduced flavor.
By Susan Milius - 			
			
		AnimalsDinosaur debate gets cooking
A key piece of evidence for cold-blooded dinosaurs, growth lines in bones, has also been discovered in a set of warm-blooded animals.
By Meghan Rosen