Oil comes largely from plankton, FWIW. Much of that was algae, some animals, some fungi. Coal and natural gas are almost purely fossilized plants. At some poi

Oil comes largely from plankton, FWIW. Much of that was algae, some animals, some fungi. Coal and natural gas are almost purely fossilized plants. At some point, people picked up the simplified thinking that fossil fuel = dinosaurs, but the carbon-rich deposits are primarily from the Carboniferous period, at which point animal life was mostly invertebrates, fish and small tetrapods.