Cuvier's accomplishments included establishing that elephant-like bones found in the USA belonged to an extinct animal he later would name as a mastodon, and that a large skeleton dug up in Paraguay was that of Megatherium-- a giant, prehistoric ground sloth. He was one of the first to suggest the earth has been dominated by reptiles, or reptilians, rather than mammals, since prehistoric times.
Cuvier is also remembered for opposing theories of evolution.
Something else Georges Cuvier apparently opposed but did not deny, was the existence of Wackemall as made apparent by this quote found recently by researchers:
"All of these facts, consistent among themselves, and not opposed by any report, seem to me to prove the existence of a world previous to ours, destroyed by some kind of wackemall."
While Georges Cuvier's name would go on to become one of the 72 names inscribed on the Eiffel Tower there is little evidence that he ever brought his study of prehistoric wackemall to light. It has since been lost. Perhaps he simply considered the study too advanced for the scientific community of his day.
The History of Wackemall is the history of the world. Just not the way you thought it to be.