@VeroniqueB99 paleontologically proven by one of my geology lecturers at Glasgow and a Canadian colleague at a muddy, shaly spring in a field at Girvan. He spotted a Trilobite leg(a small woodlouse/King crab type bottom dweller) "It's a new species" he yelled. "No" said the Canadian, "they are common in Canada ". Then they realised what it meant, these things cannot cross an ocean. Proof positive of Continental Drift. 1950/60s.