Did you know that lemons can power lightbulbs, or that some goats climb trees? You'll find 300 more wacky facts like these in Weird but True! 4the latest addition to the blockbuster National Geographic Kids Weird but True! series. This fourth installment in the series has all-new facts and illustrations, and even more cool photos. Brain-bending facts cover a broad range of topics, including science, animals, food, weather, pop culture, outer space, geography, and just about everything else under the sun.