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These are the first known cases of individuals catching the virus from their pets in Canada or the U.S.

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The test uses levels of plasma amyloid-β to estimate the buildup of protein plaques in the brain.

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Pectin fragments may signal plant cells to maintain a type of growth suited to darkness.

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image: Viruses Related to Zika May Also Harm Fetuses

Viruses Related to Zika May Also Harm Fetuses

By Ruth Williams | January 31, 2018

Studies in mice suggest that other flaviviruses, such as West Nile virus and Powassan virus, may cause birth defects, too. 

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image: Image of the Day: Red-Hot Mitochondria

Image of the Day: Red-Hot Mitochondria

By The Scientist Staff | January 29, 2018

Mitochondria may sustain temperatures more than 10 °C warmer than human cells, say researchers. 

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The findings more than double the number of known defense mechanisms, piquing the interests of molecular biology tool developers.

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image: Flu Forecasters Predict This Year’s Season to Peak Early

Flu Forecasters Predict This Year’s Season to Peak Early

By Christina Reed | January 23, 2018

Influenza cases normally top out in February. This year brought an early start and an early peak, but how long flu season will remain is uncertain. 

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image: Human Fleas and Lice Spread Black Death

Human Fleas and Lice Spread Black Death

By Ashley Yeager | January 16, 2018

A new study suggests that the plague, which killed millions of people, was not transmitted by rats.

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The BMJ inquiry finds that researchers presented only select results from animal experiments when applying for funding and approval for human trials.

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image: Image of the Day: See You Later!

Image of the Day: See You Later!

By The Scientist Staff | January 8, 2018

Developmental biologists take a close look at how alligator embryos grow. 

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