Left-handedness

International Left-Handers Day, observed on August 13, was intentionally set on a Friday the 13th. The day aims to celebrate the uniqueness of left-handers and highlight the challenges they face in a right-handed world.

In honor of International Left-Handers Day, scientists and zoologists prove that side preference is not exclusive to humans. From kangaroos that clearly prefer their left hand, through elephants whose limbs wear out from using only one side of the trunk, to lizards that divide their vision between both eyes for prey and threats — this is how the animal brain works to survive.