Evolution of caffeine

[Angela]

"How caffeine evolved to help plants survive and help people wake up"

See:
http://www.nytimes.com/2014/09/04/science/how-caffeine-evolved-to-help-plants-survive-and-help-people-wake-up.html

[davef]

Caffeine evolves ME! In a good way that is, unlike how we went from a t-rex that can chew through a car to a pea brained flightless bird that runs around in circles and clucks