'We' keep finding old settlements which continue to add to our understanding of how people lived and existed years ago, many years ago.

This settlement was found off the coast of Sweden and with modern equipment, tools and measuring devices they have mapped it out and made a few discoveries from around 10,000 hers ago

http://www.lunduniversity.lu.se/article/watch-underwater-stone-age-settlement-mapped-out

form that site there is a link to the abstract of the paper about their discoveries