News
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		Health & MedicineTight spaces cause spreading cancer cells to divide improperly
Researchers are using rolled-up transparent nanomembranes to mimic tiny blood vessels and study how cancer cells divide in these tight spaces.
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		Quantum PhysicsQuantum fragility may help birds navigate
Birds’ internal compasses may rely on the delicate nature of the quantum world.
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		AstronomyPossible perp found in mystery of Milky Way’s missing galaxy pals
Billions of years of supernovas could explain why galaxies like the Milky Way have so few tiny companions and why those companions have so little mass.
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		LifeCities create accidental experiments in plant, animal evolution
To look for evolution in human-scale time, pick a city and watch a lizard. Or some clover.
By Susan Milius - 			
			
		AnimalsReptile scales share evolutionary origin with hair, feathers
Hair, scales and feathers arose from same ancestral appendage.
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		LifeScientists find clue to why mitochondrial DNA comes only from mom
Scientists have identified a protein that chops up the mitochondrial DNA in a dad’s sperm after it fertilizes an egg. The finding helps explain why mitochondrial DNA is usually passed on only by mothers.
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		PsychologyMoral dilemma could put brakes on driverless cars
Driverless cars race into a moral conflict over saving passengers or pedestrians.
By Bruce Bower - 			
			
		LifeNew species of bacteria found to cause Lyme disease
Camping? Don’t forget the bug spray. Lyme disease covers new ground.
By Laura Beil - 			
			
		LifeFido and Fluffy could unleash drug-resistant microbes
After discovering resistant microbes in pets, scientists worry about the role of companion animals in the spread of resistant urinary infections.
By Laura Beil - 			
			
		Science & SocietyTough gun laws in Australia eliminate mass shootings
Following the 1996 implementation of strict gun control laws in Australia, the country has not experienced any mass shootings.
By Meghan Rosen - 			
			
		NeuroscienceNewborn brain has to learn how to feed itself
Nerve cells in newborn mice can’t yet feed themselves.
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		OceansDeep-sea hydrothermal vents more abundant than thought
Ecosystem-supporting hydrothermal vents are much more abundant along the ocean floor than previously thought.