Where Did Earth’s Water Come From? - Worldatlas.com

Earth’s water originated in icy debris from the outer solar system, such as asteroids and comets. Upon impact, these objects dispersed their water on Earth.

The Earth is the only planet in the solar system where liquid water exists on the surface. Our planet is fortunate enough to orbit in the suns habitable zone, which allows for the existence of condit… [+2853 chars]

full article...