Did you know... ...that hippo sweat looks like blood? ...that a tiger's roar can be heard up to two miles away? ...that golden eagles will attack airplanes that fly too close to their nests?Robert Ripley explored more than 190 countries seeking the bizarre. World's Weirdest Critters is packed with wild and wacky animal facts from Ripley's updated collection! Readers test their own critter smarts by taking the "Who Am I?" quizzes and Ripley's "Brain Busters" along the way. They'll be amazed by the things some animals will do.