There is a valley in Panama where a weird phenomenon has baffled scientists for years. Trees from a certain cottonwood family grows with unique square trunks.
Scientists have taken saplings to be grown in controlled environments, and have found that something local to the valley must be contributing to this unique feature.
The valley sits at the foot of El Valle de Anton, a volcano which has been dormant for over 500 000 years. Locals believe that the ancient ashes is causing the trees to grow square.



















