Plunge headlong into the greatest alien mysteries of all time in this BEST OF ANCIENT ALIENSr: GREATEST MYSTERIES  two-disc set from H2T. This provocative series explores the possibility that advanced technologies such as lasers and even  gravity manipulation devices enabled ancient humans to construct colossal structures throughout the world. Many of these  "unexplained" structures show engineering techniques thought to be unknown at the time, from a Peruvian mountaintop  fortress to a power-generating Mesoamerican pyramid to Indian temples that could harness cosmic energy. Might these  technologies have come from distant galaxies? Or were the ancient build ers really extraterrestrials? And, thousands of years  later, did the Nazis experiment with similar advanced alien technologies? We'll also consider whether contemporary rituals  believed to connect humans to another dimension are based on ancient experiences with aliens. And we'll examine whether  some of humanity's most crippling epidemics, like the sixth-century Justinian Plague and the Black Death of the Middle Ages,  can be traced to the darkest voids of space. Through 75 million years of the most credible evidence available on earth, H2T  entertains these and many more spectacular prospects.