Earth's Core Leaking Hydrogen Since Planet's Formation

• A new study explains unusual chemical signatures in volcanic rocks.
• Hydrogen from Earth's core has been leaking for billions of years.
• The core was once wrapped in a global ocean of molten rock that cooled to form the mantle.
• Deep-rooted mantle plumes rising to the surface carry hydrogen from deep inside the planet.
• The study provides evidence of material exchange between Earth's core and mantle.