In an undated photo, an Indonesian family holds their pet reticulated python--probably the longest living snake species at a maximum of more than 30 feet (9 meters).
By contrast, Titanoboa cerrejonesis measured at least 42 feet (13 meters), according to a February 2009 study. The newfound, 60-million-year-old snake species' giant size was driven by the warmer temperatures of its era.
So could Titanoboa-size snakes return with global warming? "Maybe," study co-author Jonathan Bloch said. "They definitely could, or maybe ... the warming could happen so rapidly that [snakes] wouldn't have time to adapt."