The second tribe's members, through Malu's translation, tell the explorers about a time long ago when the shamans of their tribe convinced some to worship the carnivorous dinosaurs, splitting the tribe in two.

During these events, Summerlee notes some oddities about the 'ritual' vegetation necklaces that the sacrifices (themselves) were dressed in. While the 'skeleton men' sacrifice a man to a Tyrannosaurus Rex, Malone distracts the tribe while the other explorers and captured natives escape, and they retreat to the safety of a second tribe nearby (who use clothes, not paint). The three discover a gathering of native tribesmen (painted with symbolic skeletons) who regularly sacrifice humans off a cliff to the carnivorous dinosaurs. Jim, Malone, and Malu narrowly avoid being eaten by a dinosaur (presumably a Herrerasaurus), only to find that their camp was attacked and the rest of the team is gone. Exploring the Lost World to find another way home, the team finds dinosaurs, from a pair of Anatotitan to a pterodactyl rookery. Under Challenger's guidance they find the cliff in the picture and reach the top, but Gomez (who turns out to be the brother of a Portuguese who was killed on Challenger's first journey here) strands them with no way back down.

Summerlee opens the map from Challenger, finding it blank, at which point Challenger appears from nowhere leaving Summerlee no option but to accept his guidance on the exhibition. The expedition arrives in Africa where they are joined by a female guide named Malu and a Portuguese called Gomez. A newsboy associate of Malone named Jim stows away on the trip. With obvious reluctance, Challenger gives Summerlee a 'map' to be opened at a road-end village in Africa at a particular date and time. Summerlee agrees to Malone and Nielson coming on the expedition, but refuses to allow Challenger to be part of the expedition.

After receiving funding from the family of Jenny Nielson, a wildlife photographer and the daughter of a rich American contributor to the sciences, the 'scientific community' agrees to organise an exploratory expedition under the leadership of the antagonistic Professor Summerlee. The British scientific community finds his claims laughable. Challenger has a picture of a cliff and a strange beast resembling a pterodactyl that is his only evidence of the place. Malone is sent to interview Professor Challenger, an explorer and researcher who believes he is on the trail of the 'lost world,' a mysterious place in Central Africa. The film opens on Edward Malone, a junior reporter looking for an adventurous assignment.

The lost world 1992 pterodactyl