Summary:
- Scientists have discovered that a significant amount of hydrogen is hidden beneath the Earth's surface, potentially enough to power the planet for 200 years.
- The hydrogen is trapped in the Earth's mantle, the layer between the crust and the core, and is estimated to be 10 times more abundant than previously thought.
- This finding could have important implications for the development of sustainable energy sources, as the hydrogen could potentially be extracted and used as a clean fuel source.