Premise: London A picture released by the Zoological Society of London of a Mary river turtle. It sports a green mohican, fleshy finger-like growths under its chin and can breathe through its genitals. The Mary river turtle is one of the most striking creatures on the planet, and it is also one of the most endangered. The 40cm long animal, which is only found on the Mary river in Queensland, features in a new list of the most vulnerable reptile species compiled by the zoo. Photograph: Chris van Wyk/ZSL/AFP/Getty Images
Hypothesis: The Mary River Turtle is always around 40cm long.