All Groups Split Off From One
Archaeologists thought that the two groups came together at least once, which explains why the girls were linked. They provided two options for this. The Beringians may have separated before crossing the bridge, only to reconnect later. Alternatively, the Beringians might have divided after crossing. Potter prefers the latter theory.

All Groups Split Off From One
Perhaps They Split Before Beringia
Potter has a notion about how these two groups came together. During an interview with The Atlantic, he suggested that both tribes had crossed Beringia independently. Perhaps they went down different routes at various times. Normally, this notion would appear far-fetched. However, there is some evidence to back this up.

Perhaps They Split Before Beringia