Facts

1).A potato is 80 percent water, a cow 74 percent, a bacterium 75 percent. A tomato, at 95 percent, is little but water. Even humans are 65 percent water.
2).A typical liter of seawater will contain only about 2.5 teaspoons of common salt—the kind we sprinkle on food—but much larger amounts of other elements, compounds, and other dissolved solids, which are collectively known as salts.
3).“we understand the distribution of matter in the interior of the Sun far better than we understand the interior of the Earth.” - Richard Feynman.