Oceans cover more than 70% of the Earth’s surface, and scientists argue that the planet’s interior also contains a lot of water. But where did all this water come from?
On Earth there is more ocean than land. Of course, there is also a lot of water locked up as ice at the North and South Poles. Where all that water came from is a very good question. Scientists have been wondering about it for a long time. We are still not exactly sure but it is probably a combination of two places.