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Immanuel Velikovsky was a psychotherapist and popular writer of the mid-20th century. He proposed theories about rogue planets whose cycles had major impacts on ancient history. These ran directly counter to science, similar to the work of Graham Hancock.

If it had been up to me, I would have had a scene in Black Panther: Wakanda Forever with Namor cliff-diving into the Cenote Ik’kil at Chichén Itzá.
https://twitter.com/Graham__Hancock/status/1596958466069102593
The video.

To my knowledge, Graham Hancock has never retracted his claim for the original, really, really #AncientApocalypse: the one that destroyed a civilization on Mars, causing the surviving refugees to flee to Earth, where they founded an Ice Age civilization.

In the second episode of #AncientApocalypse, Graham Hancock relies upon the interpretations of Italian businessman Marco Vigato, whose frankly white supremacist book on Atlantis (published by Inner Traditions) is a racist wet dream. It is laughably bad.