Gertie the Dinosaur was released in 1914 by Windsor McCay. It was the first film to use some animation techniques such as keyframes and tracing paper, and was the first film to feature a dinosaur.
100 years later and we have come a long way in animation technology as well as scientific knowledge of dinosaurs. Hollywood has featured dinosaurs in popular science fiction movies, and BBC has published many documentary-style films about prehistoric life. In December 2013, BBC released a reboot of their popular Walking with Dinosaurs documentary with a new 3D film.
Happy centennial, Gertie!