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Scientists to read Cassius the giant crocodile's bones to find out exactly how old he was when he died

Live Science
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Cassius, the world's largest living captive crocodile, died in Australia this month .

The 17 feet and 11.75 inch ( 5.5 meters ) croc could have been over 120 years old .

Scientists plan to cut into Cassius ' back and right femur bone to take samples that will be sent away for testing.