Researchers are turning to a variety of techniques to bring back the American chestnut tree, NPR reports. The chestnut used to make up a quarter of hardwood forests on the East Coast, but it was brought low in the early 1900s by a fungus carried by imported Chinese chestnut trees.

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While gene therapies may have high price tags, they could be cheaper than the cost of managing disease, according to MIT's Technology Review.

Researchers are looking for markers that indicate which cancer patients may respond to immunotherapies, the Associated Press writes.

In Nature this week: paternal age associated with de novo mutations in children, and more.

Nature News writes that researchers are still wrangling over the role of the p-value.