I was discussing this with my 8 year old daughter today, and afterwards did some Googling. It appears the Bering land bridge was not the (only) route of settlement and there are even advocates of a European origin for the Clovis peoples.
This is all fascinating to me, but I’d like to find some kind of synthesis of recent thought, perhaps including genetic analysis, so I can convey some current ideas to my daughter (while emphasizing of course that this is a developing field of study).
So, can anyone help with a time-saving link, book, article, or summary of how we got to the Americas and when? I mean the aboriginal populations that arrived before sailing ships and firearms, obviously.