If you're reading this sentence, you might have a fish to thank. Fish were the first animals to evolve jaws. They use their jaws primarily to eat, but also for defense, as tools—such as to burrow or ...

50 years ago last month, the world of film was changed forever when Steven Spielberg released Jaws. The movie was not only the biggest movie of 1975, but it was the first summer blockbuster, and had ...