This image is very fascinating. When one thinks about the Earth as a whole, they think of a lot of water. 70% of the Earth's surface is covered by water, yet there actually is not that much of it on the planet. Although 70% of the surface seems like a lot, in comparison to the Earth's radius, the oceans are very shallow. If all of the water on Earth was condensed into a ball, the radius of this ball would only be 700 kilometers. That is not even half the size of the Moon. This is an interesting insight into the actual amount of water on this water-planet.
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