In his Worlds in Collision (1950), pioneer scientist Immanuel Velikovsky put forward a theory that Earth had inverted during the Bronze Age Catastrophes; but many scientists considered his proposed electromagnetic cause unpersuasive. In 1982 British physicist Peter Warlow, otherwise a Velikovsky supporter, presented a gravitational explanation. Here Stephen J. Dillon and Kenneth J. Dillon of Scientia Press discuss Warlow’s The Reversing Earth (1982) and its role in the debate over Velikovsky’s theories and findings. See also https://www.scientiapress.com/theory-of-the-reversing-earth.