In 1523, an English animal trainer named John Fitzherbert said, "The dog must be trained when he is a whelp, or else it will not be [trained]; for it is hard to make an old dog [find a new scent]." Today, we've summarized his insight into this well-known adage: "You can't teach an old dog new tricks." It sounds good, but is it really true?

A show on the Discovery Channel called Mythbusters liked to take timeworn adages like this one and see if they're true or false. So MythBusters' hosts Jamie Hyneman and Adam Savage decided to go after this one, too. They found a pair of aging Alaskan malamutes who didn't know a single trick in the book. Malamutes are known for their stubbornness. As 7-year-old canines, siblings Bobo and Cece were equivalent to a couple of 50-year-olds in dog years, arguably qualifying them for the "old dog" category. After four days of training, Bobo and Cece proved Fitzherbert flat wrong. Each could heel, sit, lie down, stay, and shake upon command from Jamie and Adam.

Their conclusion: Myth busted. You can teach old dogs new tricks.