There's always room for discussion, but perhaps these previous topics will answer your inquiry.

• Old World/New World contact across the Bering Strait

• Was there any contact between Siberia and North West America between the submerge nice of the Bering 'land bridge' and 'Old World European' contact?

• What did the Asian powers think was to their east before 1500?

• How come America was not "discovered" via the Bering Strait?

• Pre-Columbian contact between Alaska and Siberia?

• Russia is so close to Alaska, why didn't the Russians discover North America well before Columbus?