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Dominating this era was Titanoboa, the undisputed largest snake in the history of the world. Most of the fossil record of ancient snakes is comprised of vertebrae like the one that launched the Titanoboa investigation.
The largest known prehistoric snake is Titanoboa, estimated at 13â15 metres (43â49 ft) in length and 1135 kgâ1819 kg in weight. Another large fossil snake is Gigantophis, estimated at around 11 metres (36 ft) in length. Both these snakes lived in tropical rain forests.