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The massive rock that smashed into Earth 66 million years ago killed off many dinosaur species, but the animals were in steady decline for millennia before the cataclysm, researchers report.

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image: Tracking Zika’s Evolution

Tracking Zika’s Evolution

By | April 15, 2016

Sequence analysis of 41 viral strains reveals more than a half-century of change. 

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image: Lightning-Fast Spider Bites

Lightning-Fast Spider Bites

By | April 8, 2016

Trap-jaw spiders have the fastest, most powerful bite of any arachnid, scientists show. 

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image: Accomplished Biophysicist Dies

Accomplished Biophysicist Dies

By | April 5, 2016

Harold Morowitz, who dedicated his career to investigating the origins of life, has passed away at age 88.

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image: Capsule Reviews

Capsule Reviews

By | April 1, 2016

Lab Girl, The Most Perfect Thing, Half-Earth, and Cosmosapiens

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image: US Zika Spread Model Updated

US Zika Spread Model Updated

By | March 31, 2016

Latest map shows that the mosquito that carries the virus may reach more US cities this summer than previously estimated.

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image: WHO: Ebola Emergency Over

WHO: Ebola Emergency Over

By | March 30, 2016

While additional flare-ups may occur, the World Health Organization says countries now “have the capacity to respond rapidly to new virus emergences.”

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image: Wait to Conceive After Zika Infection: CDC

Wait to Conceive After Zika Infection: CDC

By | March 29, 2016

The US Centers for Disease Control and Prevention issues a series of recommendations to limit the pregnancy-related risks of the mosquito-borne virus.

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image: Zika Brought to Americas in 2013

Zika Brought to Americas in 2013

By | March 24, 2016

A new analysis places the virus’s arrival around one year earlier than previously estimated.

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image: Minimal Genome Created

Minimal Genome Created

By | March 24, 2016

Scientists build a living cellular organism with a genome smaller than any known in nature.

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