New technology and the help of a volunteer college student help solve what is believed to be the fourth-oldest cold case in the U.S. using genetic genealogy.

Researchers who detected environmental DNA, or eDNA, in two zoos say the technique could one day be used to look for endangered species in remote locations in the wild.

Genetic ancestry tests, changes to how census responses were categorized and more children born to parents who identify with different racial groups led to a 276% jump in the multiracial population.

Researchers using DNA analysis say a body buried in feminine clothing and with a sword was neither strictly male or female. The grave shows the high status of some nonbinary people in their community.

Experts call it a major game-changer for cold-case investigations: DNA and genetic genealogy. These methods can also identify living people. For example...