All Stories
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		ArchaeologyThis theory suggests few workers were needed to cap Easter Island statues
A small workforce may have put huge stones on the heads of Easter Island statues.
By Bruce Bower - 			
			
		Health & MedicineSuicide rates have shot up in almost every U.S. state
Suicide rates increased sharply in nearly all 50 states from 1999 to 2016, according to a new government report.
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		AnimalsBees join an exclusive crew of animals that get the concept of zero
Honeybees can pass a test of ranking ‘nothing’ as less than one.
By Susan Milius - 			
			
		GeneticsWhy using genetic genealogy to solve crimes could pose problems
Rules governing how police can use DNA searches in genealogy databases aren’t clear, raising civil rights and privacy concerns.
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		Planetary ScienceCuriosity finds that Mars’ methane changes with the seasons
The Curiosity rover found seasonally changing methane in Mars’ atmosphere and more signs of organic molecules in an ancient lake bed.
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		AnimalsIn a conservation catch-22, efforts to save quolls might endanger them
After 13 generations isolated from predators, the endangered northern quoll lost its fear of them.
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		Health & MedicineAt-home telomere testing is not a reliable marker of aging, researcher says
Telomere testing for consumers offers a poor measure of “biological age,” says Johns Hopkins oncologist Mary Armanios.
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		Tech50 years ago, NASA astronauts prepared to return to space
Apollo 7 crewmembers underwent their first major tests 50 years ago. Today, U.S. astronauts struggle to get into space.
By Dan Garisto - 			
			
		Health & MedicineThere are benefits to prenatal yoga, but lingering questions remain
Prenatal yoga offers benefits to pregnant women, but a bigger and more rigorous body of research is needed.
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		TechA new 3-D printer builds temporary electronics on your skin
A new 3-D printer that tracks and compensates for your slightest twitch can precisely print simple electronic devices onto your skin.
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		ClimateTropical cyclones have slowed over the last 70 years
Tropical cyclones are moving 10 percent slower, on average, than they did in the mid-20th century, potentially making them more dangerous.
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		Particle PhysicsIf real, dark fusion could help demystify this physics puzzle
Fusing dark matter particles might explain why galaxy cores have evenly distributed dark matter.