Continents move as fast as human fingernails grow.

It's true! The continental plates, which carry the continents, are constantly moving across the Earth's surface due to convection currents within the mantle. While the speed varies, it is often in the order of 1 to 10 centimeters per year, which is indeed roughly the same rate at which human fingernails grow. This is a fascinating example of geological processes occurring on a scale that is difficult for us to perceive in our daily lives.