There was much more manganese on the land back then, and manganese will do wonderful things to the body. Some soil core samples suggest as much as 17% in places

There was much more manganese on the land back then, and manganese will do wonderful things to the body. Some soil core samples suggest as much as 17% in places. Today our best environmental exposure is not from vegetables, but bathing/surfing in coastal waters where much of it has ended up, when it would be broken down by bacteria and/or rained off the land.