[bcsco]

At some point, as glaciers receded northward, the land along this coast began to sink, and over the centuries the sea moved in, submerging the hunting camps.

It must have been due to their reliance on fossil fuels and all the resultant pollution. Too bad they didn't have AlGore to tell them the error of their ways.

[A message]

Apparently those stone age folk had one heck of a carbon footprint.