Source of coffee’s kick found in its genetic code
Caffeine genes evolved at least twice in plants
![coffee plant](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/09/ti_Coffea_canephora_at_Aanakkulam_free.jpg?fit=860%2C460&ssl=1)
DOUBLE SHOT Coffee doubled up on caffeine-making genes, possibly giving itself an evolutionary edge. Those genes evolved independently from similar ones found in tea and chocolate plants.
Jose/Wikimedia Commons (CC BY-SA 4.0)