Salmon Diversity Lost

Chinook salmon living in the Columbia River in Washington State have lost about two thirds of their genetic diversity, according to a new PLOS One study.

Researchers from Washington State University examined 346 ancient and 366 contemporary salmon samples from different spots in the Columbia River basin, obtaining the ancient samples, some of which stretched back 7,000 years, from middens.

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The Wall Street Journal looks into the cost of new gene therapies.

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