What was the ancient civilization before the Catastrophe?

All the peoples of the world have legends about an ancient catastrophe that befell our planet. Legends say that the disaster was accompanied by terrible floods, earthquakes, volcanic eruptions, many countries were depopulated, and part of the land plunged to the bottom of the sea. There is a scientific hypothesis that these destruction and death brought a comet, which invaded the sky of the Earth about 13-14 thousand years ago. What was the world before the disaster?
Many facts of ancient history and the unique finds of archeology reveal an unexpected picture before us. She proves that there was once a highly developed civilization on Earth, that the peoples who died and scattered as a result of the disasters possessed great knowledge in the field of mathematics, medicine, construction, astronomy, aerodynamics, etc. Traces of these knowledge are found in Russia, in India, in Egypt , In South America...
Orientalist and Indologist Alexander Gorbovsky opens up unknown pages of the history of mankind to readers. Each chapter of the book is completed by the commentary of outstanding researchers and scientists