Joe Barbera, one of the animators/co-creators behind Johnny Quest, Dastardly & Muttley, The Jetsons, The Fintstones, Yogi Bear and so many more died of natural causes at the age of 95.
Holy crap. 95? Everything is a "natural cause" at 95. That was a pretty good run, Mr. Barbera. Of course, it's not half as long as your cartoons will be remembered.