Earth’s core may contain as much as 45 oceans’ worth of hydrogen, scientists find

By Mindy Weisberger, CNN (CNN) — Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly making it the planet’s largest hydrogen reservoir, researchers recently estimated. And nine hydrogen “oceans” is