A shark expert, whose own curiosity about these fascinating fish was sparked by the movie "Jaws," explains some of their unique features and the many discoveries made in the decades after its release.

The toothy villain of “Jaws” terrified audiences in 1975. Offscreen, the hit film — which is celebrating its 50th anniversary — impacted sharks in unexpected ways.

The summer of 1975 was one for the history books, changing America’s relationship with cinema—and the ocean. The summertime beaches of 1975 were empty, but the movie theaters were full thanks to Steven Spielberg’s thriller Jaws.