Health Editor’s Note: Were you aware that there are several ways to define “time?” First there is the scientific definition of time, then the arrow of time, time dilation, time travel, time perception, and the beginning and end of time…..Carol
What Is Time? A Simple Explanation
by Anne Marie Helmenstine, Ph.D.
Time is familiar to everyone, yet hard to define and understand. Science, philosophy, religion, and the arts have different definitions of time, but the system of measuring it is relatively consistent. Clocks are based on seconds, minutes, and hours. While the basis for these units has changed throughout history, they trace their roots back to ancient Sumeria. The modern international unit of time, the second, is defined by the electronic transition of the cesium atom. But what, exactly, is time?