How was Stonehenge created? Did circle builders use math to arrange the stones? What happens on Midsummer Day? Some things are so strange that they cannot be explained. This series explains the connection between science and natural phenomena and how science can be used to try to explain mysteries.

The mystery of crop circles has puzzled people for years. What causes them to appear so suddenly? Could crop circles be messages from outer space? Can we get to the bottom of this mystery using science and logic, or will it continue to mystify us forever? Discover all of the theories, from the reasonable to the ridiculous, then decide for yourself what to believe. Learn how scientists analyze and explain fakes and hoaxes. This book includes eyewitness accounts, dramatic photographs, up-to-date information, a glossary, further resources, and web search tips.

This series examines weird and unexlained phenomena including aliens and ghosts. Each title ends with an open question and leads the reader to make up his or her own mind.

Here's help in selecting current, nonfiction books that will get boys excited about reading. Enticing boys to read is still a hot topic. With chapters like "Disasters and Mysteries," "Gross and Disgusting," "Machines and the Military," and "Prehistoric Creatures," Gotcha Again for Guys!: More Nonfiction Books to Get Boys Excited about Reading is a treasure trove of recent nonfiction books that will interest boys in grades 3-8. This sixth entry in Baxter and Kochel's Gotcha series covers books published between 2007 and 2009, with a few oldies-but-goodies also included. The book is organized into 12 thematic chapters, each of which offers booktalks for a select number of titles, followed by a list of other high-interest, well-reviewed titles that correspond with the chapter's topic. Features new to this volume include numerous booklists to be copied and saved, as well as profiles of new and innovative nonfiction authors writing for this age group. In addition, the book features interviews with seven male authors of nonfiction books for boys.

For years, mysterious symbols and patterns have been appearing in many fields. What created them and what could they possibly mean? Are they the work of beings from another world or simply the works of dedicated hoaxers? Using the scientific method and available information, this book attempts to find out!

Examines the phenomenon of ESP, or extrasensory perception, and the theories that exist to explain it.

How did life on Earth begin? Has there ever been life on Mars? Are we receiving signals from other planets? Some things are so strange that they cannot be explained. This series explains the connection between science and natural phenomena and how science can be used to try to explain mysteries.