Ammonites were jet set of the Mesozoic era, say scientists

Shelled creatures roamed oceans millions of years ago by jet propulsion, suggests innovative 3D imaging

Analysis of an extraordinary fossil discovered in a Gloucestershire gravel pit has given fresh insight into how an ancient sea creature swam through oceans and defended itself from predators millions of years ago.

Innovative imaging techniques have allowed scientists to build up a 3D picture of the inner workings of the ammonite, best known by the shell-shaped fossils found on beaches and sea cliffs.