Last month, National Geographic did a special episode about Cândido Godói, Brazil, a small town in the state of Rio Grande do Sul. The town, which is occupied by descendants of German immigrants, many of whom still speak German, has one of the highest incidences of twins in the world. The special focused on a new theory an Argentine historian has about the large incidence of twins.

While you can hear about the various theories in the video, there are other examples of this twin phenomenon, notably in a town in India.

What do you think?