Prehistoric humans rarely mated with their cousins

At present-day, more than ten percent of all global marriages occur among first or second cousins. While cousin-marriages are common practice in some societies, unions between close relatives are discouraged in others. In a new study, researchers investigated how common close parental relatedness was in our ancestors.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/09/210914124950.htm