Best friends — you grow close to those special people in your life by sharing emotions with them, going through tough times with them and much more. But did you know you might be somewhat related to them, too?
A new study from authors at Yale and the University of California San Diego says we share a bit of DNA with our close friends. The study claims close friends share 1 percent of their genetic makeup. That's about the same similarity as fourth cousins — or those who have the same great, great, great grandparents.
The study, published in Proceedings of the National Academy of Sciences, looked at 1,932 people and compared 1.5 million genetic markers.
To learn more about the study and how DNA factors into our choice of friends, watch this Newsy video.