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Even the best editor sometimes introduces typos. That’s true whether the editor is human or a version of the much-heralded gene-editing tool CRISPR.

One type of CRISPR gene editor that changes individual DNA bases, rather than cutting DNA, introduces more unwanted mutations than expected in mouse embryos and rice plants, researchers report. Those mistakes occurred in places where the...

BALTIMORE — A 10-second handshake could transfer a person’s DNA to an object that the person never touched.

In handshaking experiments, people who never picked up a knife became the major source of DNA on the handle about 7 percent of the time, forensic scientist Cynthia Cale reported February 21 at the annual meeting of the American Academy of Forensic Sciences. That DNA was transferred...

A popular at-home DNA testing company has announced that it is allowing police to search its database of genetic data just as customers do when looking for family members. But there’s one big difference: Police are trying to track down rape and murder suspects using relatives’ DNA.

Since Joseph James DeAngelo was arrested as the suspected Golden State Killer last April, police have...

“Feed a cold, starve a fever,” or so the adage goes. But fruit fly experiments suggest that sleep may be a better remedy.

A microbe-fighting protein helps control how much and how deeply fruit flies sleep, researchers report in the Feb. 1 Science. That’s evidence that sleep speeds recovery from illness, they conclude.

“We finally have a very clear link between being sleepy and...