Some scientists think that Jupiter is responsible for making our's an ocean planet.
Some researchers think that we owe our oceans to the planet Jupiter. Their computer models suggest that asteroids bearing water were nudged out of the asteroid belt by Jupiter billions of years ago. Jupiter would simply clear out and disrupt that region too quickly. So if Jupiter were at 3 AU, the Earth would still be there, but very likely our oceans would not. These asteroids may have supplied Earth with most of its water.