Was Nashville once home to a giant race of humans? No, but in 1845, you could have paid a quarter to see the remains of one who allegedly lived here before The Flood. That summer, Middle Tennessee well diggers had unearthed the skeleton of an American mastodon. Before it went on display, it was modified and augmented with wooden "bones" to make it look more like a human being and passed off as an antediluvian giant. Then, like so many Nashvillians,...