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Unexplained Mysteries
George Ivanoff
出版Cengage Learning Australia, 2016-07-22
主題Juvenile Nonfiction / Readers / IntermediateJuvenile Fiction / ClassicsJuvenile Fiction / Mysteries & Detective Stories
ISBN01703795159780170379519
URLhttp://books.google.com.hk/books?id=-wgFkAEACAAJ&hl=&source=gbs_api
註釋The world is full of unexplained mysteries ' unusual events that nobody can understand, and questions that nobody can answer. Do UFOs exist? Is there life on other planets? Why do some people go missing without a trace? This book explores some of the most intriguing mysteries over the years, and the theories that people have developed to explain them.