Emotions helped us survive the savannahs. When any morning might turn you into some saber toothed tiger's breakfast then fear was your friend. The “motion” in “emotion” was important. Some of the fastest running in history has been done due to terror.

Emotions helped us survive the savannahs. When any morning might turnyou into some saber toothed tiger's breakfast then fear was your friend. The “motion” in “emotion” was important. Some of the fastest running in history has been done due to terror.