Sharks can be deadly and in many ways mysterious. But in the 35 years since "Jaws" first terrified movie-goers, (the movie was released June 20, 1975) science has revealed much about sharks, their evolution, and how they work.

With thousands of species of ants crawling beneath your feet every day, in cities and rural areas, you'd think we'd know our six-legged pals. But of course they're tiny and many don't make a peep. So here's a close-up glance at the lives of ants, some ben