The Human Family Tree

As seen in National Geographic Channel's The Human Family Tree, scientists swab the cheeks of close to 200 random New Yorkers. The DNA of these volunteers will be used in National Geographic's Genographic Project, a five-year research study that aims to sample the DNA of more than 100,000 indigenous people from around the world, with the ultimate goal of charting new knowledge about the migratory history of the human species.