History’s most enduring mysteries and legends involve tales so incredible that they blur the line between fact and fantasy. This nonfiction series for age 12 and up examines current evidence surrounding Bigfoot, alien activity, and other mythical creatures and sites, as well as related conspiracy theories, cover-ups, hoaxes, and famous sleuths. The truth is out there—uncover it! Area 51, in the desert outside Las Vegas, Nevada, is a place so mysterious that for years the U.S. government wouldn't admit it existed. Cloaked in secrecy, the restricted military zone is now known to play a key role in American aeronautics and defense. But conspiracy theories about extraterrestrial activity in the area persist: flying saucer remains, aliens, UFOs/UAPs. For readers age 12 and up, this title investigates the phenomena surrounding Area 51, from historical accounts and popular myths to hard facts, evidence, and notable truth-seekers. Includes a glossary, index, sidebars, and further resources.