The Nutshell

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image: The First Americans

The First Americans

By | July 23, 2015

Two genetic studies seeking to determine how people first migrated to North and South America yield different results.

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image: Cognitive Decline More Swift in Women

Cognitive Decline More Swift in Women

By | July 22, 2015

Mental agility in women deteriorates at twice the rate of that in men, according to a study of people with mild cognitive impairment.

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image: HHS Partners on Ebola Drug

HHS Partners on Ebola Drug

By | July 22, 2015

The US Department of Health and Human Services will put nearly $20 million toward the development of an Ebola drug as Tekmira steps out of the space.

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image: French Teen in HIV Remission

French Teen in HIV Remission

By | July 22, 2015

An 18-year-old who was born with HIV but stopped taking antiretroviral drugs before she turned six has no detectable levels of the virus in her body.

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image: Delayed Turnover

Delayed Turnover

By | July 21, 2015

Aggregate-forming amyloid β proteins are replenished more slowly with age, and this may contribute to a person's risk of developing Alzheimer’s disease.

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image: GM Mosquito Cuts Wild-Type Numbers

GM Mosquito Cuts Wild-Type Numbers

By | July 21, 2015

Release of a transgenic version of Aedes aegypti, a species that can carry dengue virus, decimated a local population of non-mutated mosquitoes, according to a study.

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image: Ocean Microbes Alter Skies?

Ocean Microbes Alter Skies?

By | July 21, 2015

Satellite data suggest aerosols from bacteria and phytoplankton seed dense, highly reflective clouds.

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image: $100M Boost for SETI

$100M Boost for SETI

By | July 20, 2015

The Breakthrough Prize Foundation and billionaire entrepreneur Yuri Milner launch a $100 million search for extraterrestrial intelligence.

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image: “Feathered Poodle From Hell” Dino Found

“Feathered Poodle From Hell” Dino Found

By | July 20, 2015

A newly discovered relative of Velociraptor had abundant plumage and birdlike wings.  

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image: Why Screams Scare Us

Why Screams Scare Us

By | July 20, 2015

Analyzing the acoustical qualities of screams and other sounds, researchers pinpoint why people find screams—and emergency vehicle sirens—frightening.

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