In 2014, scientists crushed a diamond and found a tiny blue clue to water deep inside Earth

A tiny blue speck found inside a Brazilian diamond has revealed a groundbreaking discovery about Earth's deep interior.

This mineral, ringwoodite, confirmed the presence of structurally bound water within the mantle transition zone, a layer hundreds of miles below the surface.

This finding significantly alters our understanding of the planet's water cycle and its dynamic geological processes.