Wallace Beery is the rather eccentric "Prof. Challenger" - an eminent explorer who tries to convince his justifiably sceptical peers of a plateau in the Amazonian jungle where there be dinosaurs... Derided and ridiculed, he secures some funding from "Sir John Roxton" (Lewis Stone), assembles a team and back they go - promising to return with proof positive. The acting is adequate - that's not what matters, really - it's the wonderful and fluent actions of the stop motion photography that makes the stand out. These effects are superb. Basic, sure, and the scale of the sets around them isn't like... read the rest.