Map of the Americas showing pre Clovis sites. Adapted from http://www.sciencemag.org/news/2017/08/most-archaeologists-think-first-americans-arrived-boat-now-they-re-beginning-prove-it and https://en.wikipedia.org/wiki/Clovis_culture#Evidence_of_human_habitation_before_Clovis
Own work
Pratyeka