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Earliest Human Engraving Or Trash From An Ancient Lunch?

Carved zigzag marks on a shell found more than a century ago have drawn new interest from archaeologists. The half-million-year-old lines aren't from an animal, and might be art from Homo erectus.
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Our Ability To Digest Alcohol May Have Been Key To Our Survival

Our primate ancestors could consume alcohol 10 million years ago in the form of fermented fruit, researchers have discovered. The finding suggests that our relationship with alcohol is ancient.
NPR

FDA Considers Allowing Blood Donations From Some Gay Men

The lifetime ban on blood from any man who has had sex with men dates to the 1980s, before there was a good test to screen for HIV. Critics say the policy is outmoded and needlessly discriminatory.
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NASA Prepares To Test New Spacecraft (That You've Likely Never Heard Of)

The new vehicle, named Orion, is designed to carry humans into deep space. But most Americans aren't aware it exists.
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Study Shows Riding The Quiet Car Is Crushing Your Spirit

An experiment in Chicago randomly assigned train and bus riders to either talk to the stranger next to them or commute quietly. The result? Even for introverts, silence leaves you sadder.
NPR

Tumbling Oil Prices Give A Boost To Drivers During The Holidays

An OPEC meeting last week sent oil prices tumbling when the cartel decided not to restrict production to boost prices. Now some are predicting parts of the U.S. will see gas prices under $2 a gallon.
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Ebola In The Air: What Science Says About How The Virus Spreads

Turns out, Ebola is transmitted through the air, but it's not very good at spreading through the airborne route. What in the heck does that mean? We dig into the science to clear up the kerfuffle.

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To Boldly Go Where No 3-D Printer Has Gone Before: Yep, Space

NASA 3-D printed an object on the International Space Station for the first time this week. It's an important step toward long missions — like to Mars — where all necessary items won't fit on board.
NPR

Taking Stock Of America's Toxic Sites And The Millions Living Near Them

A recent National Geographic article looks at toxic waste sites in the U.S. and the more than 49 million Americans who live near them. NPR's Eric Westervelt talks with writer Paul Voosen about his piece.
NPR

Millennials Might Be 'Generation Twin.' Is That A Bad Thing?

Between 1981 and 2012, 1 million extra twins were born in the U.S. One economist says all of those twins could be hurting the economy — but another expert points out some perks of twinhood.

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