File this under: What don’t we know?We just discovered slice “2″ is alive. |1 – Continental crust | 2 -Oceanic crust | 3 – Upper Mantle | 4 – Lower Mantle | 5 – Outer Core | 6 – Inner Core | Image Credit: Dake You might have thought that photosynthetic life forms had the Earth covered, but according to some researchers the largest ecosystem on Earth was just discovered and announced last Thursday, and it’s powered by hydrogen, not photosynthesis.The Oceanic Crust is the rocky hard part under the mud that lies under the ocean. It covers 60% of...