Macleans: South Carolinas state beverage is milk. Its insect is the praying mantis. Theres a designated dancethe shagas well a sanctioned tartan, game bird, dog, flower, gem and snack food (boiled peanuts). But what Olivia McConnell noticed was missing from among her homes 50 official symbols was a fossil. So last year, the eight-year-old science enthusiast wrote to the governor and her representatives to nominate the Columbian mammoth. Teeth from the woolly proboscidean, dug up by slaves on a local plantation...