Scientists have used an optimized version of the CRISPR-Cas9 gene-editing system to prevent hearing loss in so-called Beethoven mice, which carry a genetic mutation that causes profound hearing loss in humans and mice alike.

In the first major multisite randomized controlled trial of workplace wellness programs, researchers found that while they may help people change certain behaviors, they do little to improve overall health or lower health care spending.

Harvard researchers have identified in mice a set of neurons responsible for sustained pain and pain-coping behaviors. The new study is the first one to map out how these responses arise outside the brain.

A Harvard study has found that children born in August in states with a Sept. 1 cutoff birth date for school enrollment have a 30 percent higher risk for ADHD diagnosis than peers born in September, which may reflect overdiagnosis.