Saturn in a water drop - Markus Reugels makes worlds appear in water droplets. He uses high-speed photography to capture the exact moment a droplet frames a planetary backdrop. He places images of the planets in the background and then lets the drop fall, triggering his camera at the correct split-second moment.
As Earth spins, gravity points toward the center of our planet (assuming for explanation's sake that Earth is a perfect sphere), and a centrifugal force pushes outward. But since this gravity-opposing force acts perpendicular to the axis of Earth, and Earth's axis is tilted, centrifugal force at the equator is not exactly opposed to gravity. This imbalance adds up at the equator, where gravity pushes extra masses of water and earth into a bulge, or "spare tire" around our planet.