Footprints in the sand

Archeologists working along the shore of British Columbia have found the oldest known footprints in North America. The image above is from a NYT article describing the find: https://www.nytimes.com/2018/03/28/science/footprints-oldest-north-america.html
The article has a link to the actual scientific article that was published in PLOS One laste week.
The find adds a bit of evidence to the still contentious idea that the first human colonists to North America arrived via boat, takeing advantage of the rich coastal marine resources along the Pacific Coast of North America.  The hypthesized route has been called the "kelp highway".