Earth's core may have been leaking hydrogen for billions of years

Geophysicists suggest Earth's metallic core has been continuously releasing hydrogen into the mantle for billions of years. Hydrogen from deep inside the planet appears in lava from mantle plumes that rise to the surface during volcanic eruptions.

• Hydrogen from Earth's core is found in lava from mantle plumes
• The leak may have persisted for billions of years since formation
• The mantle formed as a global magma ocean cooled and crystallized