Comparisons between the inner world and the outer world have been frequently drawn by philosophers, nature writers, and visual artists. For example, "seeing the universe in a grain of sand" is a well-known aphorism. The number of neurons in your brain has been compared to the number of stars in the Milky

In baseball, hitting for the cycle means that a batter hits a single, a double, a triple, and a home run during the same game. Hitting for the cycle is a rare baseball event, occurring about as often as a no-hitter by a pitcher. Certainly, a great deal of skill is involved in accomplishing such a feat.