How Did the Earth Get Its Oceans?

How Did the Earth Get Its Oceans?

“Imagination is more important than knowledge.” — Albert Einstein. Many theories abound concerning the origin of Earth’s oceans, which cover more than 70% of Earth’s surface. An array of scientific theories exists, including outgassing, comet and asteroid bombardment, volcanic activity and other possibilities during the first approximately two billion years of Earth’s ~4.6 billion-year history. Three useful studies by National Air and Space Asso…