I felt a bit of passion drawing this one. I had lost interest in art for a long while. Mostly forcing myself to draw and getting by in classes. But this one started a little spark. I’ve decided to start over with a mind of a child when drawing was for the sake of drawing.
It seems like it should be easy to figure out the amount of water on the Earth, right? Just sum up the volume of the oceans and you’re 99% done. In fact, you might have seen graphs like this showing how moons like Europa have lots more water than the Earth.
That would seem to work except there’s a problem; minerals. Many minerals can hold water in their structures. Some of these minerals occur at the Earth’s surface; clay minerals, for example, hold large amounts of water that can be released if the minerals are heated. The same is true for minerals that sit deeper down.