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13 August 2015 Last updated at 07:40 BST
Scientists, who have lots of theories about zebras' stripes, think they developed stripes to dazzle predators.
Using computer models, researchers confirmed the markings create optical illusions when the animals move.
They think this confusion helps to protect the animals from both big cats and tiny insects.
Zebras' bold stripes protect the animals by masking their movements, according to a study.