Eric Walker added Coprolite - Wikipedia to Coprolite

Eric Walker added Phosphorus: Humanity Is Flushing Away the Element - The Atlantic to Coprolite and Phosphorus

Eric Walker added Coprolite - Wikipedia and Phosphorus: Humanity Is Flushing Away the Element - The Atlantic to Coprolite, and added Coprolite to Phosphorus

Eric Walker added a number of topics and a number of links to Phosphorus, and added Phosphorus to Chemical elements