“Life below the surface is neither simple nor monotonous. The subterranean, contrary to what most people think, is bustling with activity. As you tunnel deep down, you might be surprised to see the soil take on unexpected shades. Rusty red, soft peach, warm mustard, lime green, rich turquoise … Humans teach their children to paint the earth in one colour alone. They imagine the sky in blue, the grass in green, the sun in yellow and the earth entirely in brown.”