Otzi Educating Otzi Time, Otzi. Time is the interval perceived between two events.
Time flows toward the future.
There is evidence of six ice ages in the planet's history, the first occurring 2.3 billion years ago. Yesterday you nibbled a slice of papaya. For you, a single slice sustains life. Pythagoras, who lived between 580 and 500 BC, while you slept like an embryo under your glacier, discovered the mathematical relationship between the length of a string and the pitch of the sound it makes while vibrating. This is a string.