The ancestors of the Arizona bark scorpion and of other scorpions and spiders underwent a whole-genome duplication event, Phoenix-area KJZZ reports. It adds that while whole-genome duplication events aren't unprecedented, duplications on a smaller scale, such as of chromosomes or single genes, are more common.

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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.