Etienne secures a headset over Marie-Laure’s ears. Through the headphones, she can hear him turn a crank, switch on something, and then, as if positioned directly in the center of her head, a piano plays a sweet, simple song. The song fades, and a staticky voice says, Consider a single piece glowing in your family’s stove. See it, children? That chunk of coal was once a green plant, a fern or reed that lived one million years ago, or maybe two million, or maybe one hundred million…
