Short answers, pulled from the story.
Sir Arthur Conan Doyle attended the lecture on the 13th of February 1911. He listened to Percy Harrison Fawcett speak about a dangerous region in Bolivia known as the Huanchaca Plateau.
Zoologist Ray Lankester wrote the factual source book Extinct Animals. Sir Arthur Conan Doyle drew heavily from this work while developing his story.
The Strand Magazine published The Lost World in serial form during the months of April through November 1912. Magazines in the United States ran the serialization from March to November 1912.
A herd of Iguanodons found in the glade had skins like black crocodiles. These large plant-eating dinosaurs looked like monstrous kangaroos twenty feet in length.
Film adaptations include versions released in 1960, 1992, 1998, and 2005 following the original 1925 release. Direct-to-video films included Return to the Lost World in 1992 and King of the Lost World in 2005.