Where did earth's water come from?

If the Earth's oceans were formed from water on our own planet, rather than asteroids, that would solve a couple of problems for planetary scientists. One is why Earth seems to have so much water in the first place. read more

Researchers from the University of Hawaii believe they have discovered the origin of Earth’s water. For many years, scientists were uncertain whether water was present when our planet formed or if it was carried by comets and asteroids at a later time. read more

The origin of water on Earth, or the reason that there is clearly more liquid water on Earth than on the other rocky planets of the Solar System, is not completely understood. There exist numerous more or less mutually compatible hypotheses as to how water may have accumulated on Earth's surface over the past 4.5 billion years in sufficient quantity to form oceans. read more