News
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		Health & MedicineTo treat the heart, start with the gut
Preventing gut bacteria from making certain chemical compounds reduced artery clogging in mice, researchers report.
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		LifeIn the body, cells move like flocks of birds or schools of fish
Cells move in groups similarly to flocks of birds and schools of fish
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		NeuroscienceMini microscope is a window into live muscle tissue
A tiny microscope offers unprecedented views of live human muscles.
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		Particle PhysicsLHC restart provides tantalizing hints of a possible new particle
The first comprehensive analyses of the recently restarted Large Hadron Collider yields no clear-cut discoveries but at least one intriguing hint of a new particle.
By Andrew Grant - 			
			
		AnimalsForgetful male voles more likely to wander from mate
Poor memory linked to a hormone receptor in the brain could make male prairie voles more promiscuous.
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		Climate195 nations approve historic climate accord
The Paris climate talks end with delegates from 195 nations releasing a hard-fought agreement to curb climate change and limit warming to 2 degrees Celsius.
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		CosmologyDebate grows over whether X-rays are a sign of dark matter
The dwarf galaxy Draco, which is chock-full of dark matter, doesn’t emit a band of X-rays that researchers hoped were produced by the mysterious invisible stuff.
By Andrew Grant - 			
			
		LifeTo push through goo, use itty, bitty propellers
Newly designed micropropellers mimic bacteria to move through viscous surroundings.
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		Planetary ScienceIt’s a new planet! It’s an unknown star! It’s — oops!
A couple of unexpected wandering points of light in the sky could be new planets or even a dim star orbiting the sun, but researchers have plenty of reasons to be skeptical.
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		EarthGooey rock in mantle thickens 1,000 kilometers down
Gravitational tugs provide an unprecedented peek into the structure of Earth’s mantle and reveal a sudden increase in viscosity roughly 1,000 kilometers below ground.
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		ChemistryElusive chemical reaction transition state captured
A new method provides a detailed look at the elusive transition state.
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		Archaeology6,000-year-old skeletons in French pit came from victims of violence
Human bones in a French pit recall lethal conflicts and limb lopping 6,000 years ago.
By Bruce Bower