““Plants are acutely aware of the world around them. They are aware of their visual environment; they differentiate between red, blue, far red, and UV lights and respond accordingly. They are aware of aromas surrounding them and respond to minute quantities of volatile compounds wafting in the air. Plants know when they are being touched and can distinguish different touches. They are aware of gravity: they can change their shapes to ensure that shoots grow up and roots grow down. And plants are aware of their past: they remember past infections and the conditions they've weathered and then modify their current physiology based on these memories.””