"First described by Plato, the idea of Atlantis has existed since 360 BC! Learn about the history of the Greek god Poseidon's relationship with the kingdom and the real research that's been done by historians and scientists who are trying to locate Atlantis. Featured in plenty of movies, books, and comics, Atlantis is still relevant in popular culture today...but does it really exist? Find out all the facts we do know about it in this exciting book"--...

"Read about all of the rational and fanciful explanations for the flattened patterns in crops all over the world, from the United Kingdom to Australia. Artists and hoaxers alike have claimed credit for these massive projects, but some people think that the source could be paranormal. Are these circles an elaborate prank, or could they be something more?"--

"In 1961, Betty and Barney Hill claimed to have experienced a bizarre night that included extraterrestrials, flying saucers, and a few lost hours during which they could recall very little until they underwent hypnosis. Their mysterious story was just the first of many that have been told by people who have since come forward with their own similar experiences. Although there are thousands of people who claim to have experienced alien abduction, much...

"In 1947, an unusual object crashed in the New Mexico desert and was recovered by the Roswell Army Air Field officers. People everywhere began to speculate what the object could be. Could it possibly be a flying saucer? Would that be proof of aliens and life beyond Earth? Even decades later, some people still believe that the Roswell Incident is the most famous UFO sighting ever. Still, those who worked at the airfield insist it was just a weather...

"Sea monsters have a long history in lore and literature. Homer first wrote of them in 700 BCE. What Do We Know About the Kraken? lets curious young readers explore what we actually know about this mysterious sea monster's long history. Dive into the facts behind this massive squid-like creature that was first described using the word "Kraken" in the beginning of the eighteenth century. For centuries, sailors have feared the Kraken, which they believe...

"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 ancient irrigation systems,...