For decades, biologists have known that the instructions for life are written in DNA, yet the vast majority of those letters seemed to sit in the dark, doing little that was obvious. Now a new ...

In an aerial view, Pima County sheriff’s officers gather on Nancy Guthrie’s property on Tuesday in Tucson, Ariz. | Brandon Bell, Getty Images via CNN TUCSON, Ariz. (CNN) — Only a few years ago, ...

Researchers have revealed that so-called “junk DNA” contains powerful switches that help control brain cells linked to Alzheimer’s disease. By experimentally testing nearly 1,000 DNA switches in human ...

CATALINA FOOTHILLS, Ariz. (KGUN) — The search for Nancy Guthrie continues as it's now more than two weeks since her abduction, with investigators pursuing new DNA leads and genetic genealogy options.

DNA from gloves found two miles from Nancy Guthrie's Tucson home — including one that looked similar to those worn by the suspect seen on surveillance video — did not match anyone in the FBI's federal ...

An investigation initially punctuated by ransom notes and public pleas from family members for Nancy Guthrie’s release has since transitioned to investigators seeking results from DNA evidence ...

Authorities said they're looking into using genetic genealogy in the investigation into Nancy Guthrie's mysterious abduction, and an expert says the cutting-edge technique could be the key. While ...

The Pima County sheriff investigating the disappearance of "Today" show anchor Savannah Guthrie's mother told NBC News it could take up a year to find a match for the DNA found at the scene. Nancy ...

Only a few years ago, Tuesday’s announcement that a glove believed to be connected to the disappearance of Nancy Guthrie in Tucson, Arizona, had no match in a DNA database would have been a dead end.