My uncle is now 103 and still tills a garden and writes a monthly newspaper article. His mind is sharper than most peoples at half his age. He talks and writes about events that happened 80 or more years ago like it was yesterday. He was a farmer, and also worked in a tannery with toxic chemicals. Never smoked, but enjoyed some scotch or a beer now and then. The family still gathers around him while he tells his tales and spins his yarns.