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.
Or were they? Another debate centers on the migrantsâ mode of transport. Some researchers believe Beringia was flooded by rising sea levels before its inhabitants had the chance to cross into Alaska. Challenging the idea that the land bridge was the only route in, they say groups must have ferried themselves in boats at least part of the way. This seafaring theory is supported by evidence of human occupation in Chile by 14,500 years ago.