it's a ~12800 year cycle, and the last one was the Great Flood (which is told in many other cultures mythologies too)
that event 42000 years ago (or so) was caused by a supernova 400 light years from us after which australia and antarctica were sterilized as they were in the face of the blast, and led to the white skin/red/blonde and the lactose tolerance mutation in humans, which led to the flourishing of an advanced civilization in northern africa, and they are now starting to determine the genetics of these people, who are being called "iberomarussian" as they are from the general region around the strait of Gibraltar, the greeks knew them as Atlantis and the founding king was Poseidon and his son Atlas is where the name came from, and the Titanomachy (war of the titans) was about the same thing as the Bible the "War in Heaven"
in Plato's Critias, just before it trails off and the rest of the text has been lost, it talks about how evil started to corrupt the civilization
and that was before the flood... Enoch was the one, a descendant of Adam, who was invited to learn agriculture in the centre of the capital of Atlantis, which is likely now the place known as The Eye of the Desert, and it was in this time also that the corruption that took down atlantis began, as the "devil" who tempted eve, this is a "fallen angel" which means someone with this knowledge of their advanced technology who uses it to enslave people, aka a psychopath
once you start to understand what all of it means and that it's literally space, this heaven, and literally "created beings" angels were advanced people, people who are no longer living on this planet with us but still are visiting and watching us and all the books and many other things are saying they will come back to evacuate
in Enoch it even says of the great flood, that the Head of Days regretted allowing certain individuals onto Noah's Ark because of what sprung from that - i'm just reading it now in Jasher, and about how Nimrod demanded the slaughter of Abram, as a baby, due to a sign in the heavens, which is part of the remnants of that advanced science of the Atlanteans, and this is some 1200 years after the Flood
anyway, more and more of the science behind it all is being discovered all the time
it's gonna be quite eye opening