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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.
While there are several contenders for the title of world's largest snake, here are three of the biggest and longest snakes known to man: Weighing in at 550 pounds, the aptly named giant anaconda (Eunectes murinus) is the largest snake in the world considering its length-to-weight ratio. This species, also known as the green anaconda, averages about 17 feet in length, though some individuals grow to as long as 30 feet.