Earth is an immense three-dimensional jigsaw puzzle composed of many big pieces. These include continental and oceanic plates that constantly grind against each other and occasionally up and over or down and under one another. Occasionally, the puzzle pieces get stuck and stress builds until there’s a blowout and we end up with a major disaster like the 1906 San Francisco quake along the San Andreas Fault or the 2011 Tōhoku earthquake and tsunami off the coast of Fukushima, Japan.