When rats run, their eyes point in opposite directions and side to side to watch the sky for predators, scientists have discovered. Researchers from the Max Planck Institute for Biological Cybernetics attached cameras to the rats while they ran to watch their eye movements. "When the rat lifts its head, the eyes look forward: cross-eyed, so to speak. If the animal puts its head on one side, the eye on the lower side moves up and the other eye moves down," said study researcher Jason Kerr.
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