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Their waters served as refuges during ice ages, allowing for adaptation and the emergence of new species.

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image: Mammalian Immunity: What’s RNAi Got to Do with It?

Mammalian Immunity: What’s RNAi Got to Do with It?

By | July 21, 2017

A new study adds to the evidence that mammalian cells can use small interfering RNAs to defend against viruses, but questions remain about physiological importance.

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The presence of similar light-emitting enzymes in the distantly related organisms lends new insight into bioluminescence evolution.

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image: Smallpox Kerfuffle Reveals Biosecurity Problems

Smallpox Kerfuffle Reveals Biosecurity Problems

By | July 12, 2017

A review of a 2014 incident in which mystery vials of smallpox were found at the NIH reveals security weaknesses, but also concludes the response was appropriate. 

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image: Neanderthal-Human Interbreeding Got an Early Start

Neanderthal-Human Interbreeding Got an Early Start

By | July 5, 2017

Mitochondrial DNA in Neanderthal bone suggests humans first left Africa earlier than previously thought.

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International agencies responded quickly to the crisis, but some public health officials say the world may not be ready for a bigger outbreak.

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image: RNA Protects “Naked” Genomes from Retrotransposons

RNA Protects “Naked” Genomes from Retrotransposons

By | June 30, 2017

Transfer RNA fragments prevent jumping genes from hopping around in the mouse embryo, when histone methylation can’t do the job.

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Students will not learn the theory in primary and secondary schools nationwide. 

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Research shows that human immunity develops much earlier than previously thought, but functions differently in adults.

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The new fossils push the origin of the human species back by 100,000 years.

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