> a study published in Nature last year To be clear this refers to the fusion of the Laurentide (Canadian) and Cordilleran (Pacific NW) ice sheets but the cave

> a study published in Nature last year To be clear this refers to the fusion of the Laurentide (Canadian) and Cordilleran (Pacific NW) ice sheets but the caveats are this doesn't preclude travel into parts of Alaska and it's also possible there was some travel before the sheets were fused. > brought all their supplies with them Maybe they didn't have a lot of supplies? I mean people migrated all over Siberia and presumably many/most of them did so on foot. > they have to bring all the food for the dogs The traditional view was that they were following the food source. And presumably they kept the dogs around in the first place because (among other reasons) they help hunt and are also a food source. > Whatever food they bring with them can be supplemented with fish and other seafood they can catch on the way. Maybe they can even live entirely off seafood. This logic works with any food source though.