01末日预言The Doomsday Prophecies 02玛雅人的阴谋The Mayan Conspiracy 03小灰人The Greys 04外星人与大灾变Aliens and Mega-Disasters 05与美国太空总署的联系The NASA Connection 06普马彭古的秘密The Mystery of Puma Punku 07外星人和大脚怪Aliens and Bigfoot 08达芬奇阴谋The Da Vinci Conspiracy 09时间旅行者The Time Travelers 10外星人和恐龙Aliens and Dinosaurs
Plot Summary:The Mayan civilization dominated Central America for nearly 2000 years, but by the 9th century A.D., the great Mayan cities were abandoned, and the Mayan people vanished. What could have happened to this advanced culture?
