Based on DNA analysis of USR1 with continuous gene flow occurring until around 25,000 years ago .
USR1 is the Ancient Beringians are hypothesized to have split off from East Asians around 36,000 years ago .
Based on DNA analysis of USR1 , the Ancient Beringians are hypothesized to have split off from East Asians around 36,000 years ago , with continuous gene flow occurring until around 25,000 years ago .