Genetic testing results have led to the break up of thousands of couples in Saudi Arabia, the BBC reports.

After taking pre-marriage health tests, some 165,000 couples have called off their wedding plans after results indicated "genetic incompatibilities." This, the Saudi Gazette says, is about 60 percent of the participants in the program.

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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.