The notion was roundly dismissed by all the great geophysicists, who were certain that continents were fixed, not floating on anything, and therefore unable to ‘drift’. Instead, the key twentieth-century idea in geophysics turns out to be plate tectonics; we now understand that continental plates do indeed float and ‘drift’ (or better, are carried by a kind of conveyor belt driven by the great heat engine of the Earth’s interior), and all those great geophysicists were simply wrong.

Objections to pseudoscience on the grounds of unavailable mechanism can be mistaken – although if the contentions violate well-established laws of physics, such objections of course carry great weight.