DNA ancestry tests promise to reveal where your family came from - but the science behind them is far more complicated than ...

What started as a routine DNA test turned into one of the strangest medical mysteries ever recorded. This video explores the rare condition known as chimerism, where a person can carry two completely ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Jack Steele had come to feel like pretty much everyone in his family ...

DNA tests can tell people where in the world their ancestors came from, and if they're at risk of developing different genetic conditions. They can sometimes even help people connect with family ...