Yawning Cheetah, Okavango Delta, Botswana, 1999Photograph by Chris JohnsThe world's fastest land animal takes a moment to relax with a yawn on Botswana's Okavango Delta. The teeth of these fleet-footed predators are too small to use as daggers for large kill, but the cats have strong jaws that lock around the throat of prey until the victim stops breathing.