Presenting What Do We Know About?, an exciting extension of the #1 New York Times Best-Selling Who Was? series! The Nazca Lines in Peru have mystified people around the world for centuries. The famous figures, sometimes called geoglyphs, include a hummingbird, a spider, a fish, a monkey, a dog, a cat, human-like figures, geometric designs, and more. These amazing images were believed to have been created between 500 B.C.E. and 500 C.E., and no one is quite sure how or why they were created. Some historians believe that they are anicent irrigation systems, but other researchers believe in a more paranormal origin story. Were the Nazca Lines created by ancient cultures thousands of years ago, or could they have been alien landing sites? Find out the truth about the Nazca Lines in this book for young readers.