Ancient CivilizationsMystery of Atlantis deepens as ocean floor discovery hints at ancient catastrophe Posted on August 13, 2025 by Administrator A discovery beneath the ocean floor has revealed evidence of a catastrophic event that may be linked to the destruction of the legendary lost city of Atlantis. Some researchers, including well-known author Graham Hancock, have long proposed that around 12,800 years ago, a giant comet passed through Earth’s atmosphere, triggering devastation that wiped out advanced civilizations worldwide.