Dr Spencer Wells retraces the footsteps of 200 random New Yorkers and proves they are all cousins. On the most diverse street in the most diverse city in the most diverse country in the world, a team of National Geographic scientists swab the cheeks of some 200 random New Yorkers. The goal: to retrace our ancestral footprints and prove we are all cousins in the “family of man.” Cutting edge... see more