Horner explained that oil "doesn't come from dinosaurs at all." Oil is formed from zooplankton and algae in oceans. In fact, if you would take all the dinosaurs that ever lived and squeezed the oil out of them, we would probably run out of that oil in days. Vsauce asked if there could be a tiny molecule from dinosaurs in every thousand gallons of oil. Jack Horner explained that all oil comes from marine life, so the dinosaurs (land animals) did not contribute to it.