DNA is the blueprint of life. Genes encode proteins and serve as the body's basic components. However, building a functioning organism also requires precise instructions about when, where, and how much those components should be produced.

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 to a DNA database would have been a dead end.

A DNA expert believes the kidnapper "will be identified” through investigative genetic genealogy after an unknown person's DNA was recovered at Nancy Guthrie's home.

Authorities are analyzing biological evidence in the search for Nancy Guthrie nearly three weeks after Savannah Guthrie's mom was last seen.

Authorities trying to solve the disappearance of Nancy Guthrie say they might tap DNA genealogy databases, the same step that police took to unravel a decades-old series of murders in California and the fatal stabbings of four college students in Idaho.

A man was convicted this month in the murder of a 13-year-old girl in 1982.

For the first time, researchers have succeeded in developing an artificial DNA base pair that is based on a different chemical force than natural genetic material. While the common natural DNA building blocks are held together by hydrogen bonds,

The man leading the investigation into Nancy Guthrie's apparent abduction is hopeful that DNA evidence discovered at the 84-year-old's Tucson, Ariz. , home could lead to an arrest.