Vast size of prehistoric megalodon shark, which had a fin as long as a human, revealed for the first time

A computational reconstruction of megalodon's size and proportions at different life stages: a) 16-meter adult with 12 estimated body dimensions recorded; b) 3-meter new-born; c) 8-meter juvenile and d) artistic reconstruction of a 16-meter adult.

(CNN)The true size of a gigantic prehistoric megalodon shark that ruled the oceans millions of years ago has been revealed for the first time -- and it had teeth as big as hands, and a fin as tall as a human adult.

Researchers at the University of Bristol, in southwestern England, and at the Swansea University, in south Wales, used mathematical calculations to work out the size of the megalodon shark from rare fossil remains of its teeth.
The findings were published Thursday in the journal Scientific Reports.
    Researchers told CNN that the giant shark species would have grown up to 18 meters (59 feet) in length and weighed about 48 tons, which is larger than any other shark known to have existed and more than twice the size of a great white shark.
    With teeth as big as human hands, it would have had a bite force of more than 10 tons, dwarfing that of a great white shark's bite force of two tons, researchers said.
    Its tail would have been as long as 3.85 meters (12.6 feet) and its fin would have stood at 1.62 meters in length (5.3 feet) -- the height of a human adult.
    Measuring an estimated 1.6 meters (5.3 feet), the megalodon's fin was as tall as an adult human.