Head Butt - During mating season, rams butt heads in fights that can last up to 20 hours. Their skulls are adapted to absorb the shock of these brawls. When they collide, the crash can be heard up to a mile away.
Creator of the ECOlogical Calendar, for this amazing new way to experience time. A true celebration of nature, as it follows the changing of the seasons and the relationship of the planet's organisms with their environment.