<DIV>Ripley's Believe It or Not!-authority on the strange and unusual-and Scholastic present the first of four incredible collections of the world's weirdest, wackiest facts. Believe it!<br><br>Did you know...<br> ...that hippo sweat looks like blood?<br> ...that a tiger's roar can be heard up to two miles away?<br> ...that golden eagles will attack airplanes that fly too close to their nests?<br><br>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!<br> 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. <br></div>