註釋
Several strange signs called “crop circles” have been discovered in many places on Earth. These mysterious circles are puzzling to everyone, even scientists. Could we find out who-or what- made them? The ancient Maya built pyramids which are as complex as those of Egypt. An archaeologist studying the Maya civilization for more than 20 years dreams of knowing more about Mayan kings personally. Will he discover any clues in the lost temples? Devon Island in Canada is a kind of “Mars on Earth”, has conditions and terrains similar to Mars. A group of explorers has come to this area to explore the challenges excepted when to Mars. What preparations are being made for the trip to Mars? *1 accompanying CD