Fingerprints of the Clean Up Team:
Fingerprints of the Clean Up Team - Part Three

Mass graves and hominid hugelkultur enabled agriculture and a new market economy.
Fingerprints of the Clean Up Team - Part Two

Steep-sided conical mounds appeared in 17th Century Britain and America. Most were quickly ploughed under.
Fingerprints of the Clean Up Team - Part One

In England and in the US barrows and mounds look like earth-covered food bowls.