3 years, the researchers compared the two age groups on four outcome measures: rate of complete ablation, grade of radioiodine uptake in the metastatic tumor on the posttherapy scan, cause-specific survival, and complications.
Possible route of the bridge across the Bering Strait. A Bering Strait crossing is a hypothetical bridge and/or tunnel spanning the relatively narrow and shallow Bering Strait between the Chukotka Peninsula in Russia and the Seward Peninsula in the U.S. state of Alaska.
Even if humans did cross the Bering Strait earlier than 12,000 years ago (or lived between 20,000 and 16,000 years ago on the cold tundra plain that is now the Bering Sea floor), it is very unlikely that the could have penetrated the ice sheets south of Alaska.