Modern scientific research shows that the Earth often collided with comets and meteorites in the past. Sometimes this led to completely catastrophic consequences, changes in the natural environment and the disappearance from the face of the Earth of life forms that had dominated the biosphere for millions of years. In their new sensational work, researchers K. Knight and R. Lomas, authors of the bestsellers “The Key of Hiram” and “The Second Messiah” , based on compelling evidence and analysis of ancient texts, hypothesize that ancient Europeans not only survived the Great Flood of 7640 BC. e., but also created a highly developed civilization capable of predicting collisions of the Earth with celestial bodies. Thanks to the construction of a vast and complex network of megalithic observatories like Stonehenge, prehistoric astronomers developed accurate solar, lunar and sidereal calendars, measured the diameter of the Earth and could prepare in advance for the consequences of terrible cosmic catastrophes, passing on the accumulated knowledge to new generations. Five thousand years ago, the predictions of the ancients turned out to be correct, and their amazing construction - Uriel's machine - made it possible to restore human civilization, destroyed by a terrible cataclysm.