 It is National Ice Cream Day. So who first discovered the sweet treat? According to popular legend, ice cream was invented by the ancient Chinese, brought to Italy by Marco Polo, to France by Catherine de' Medici, and then to America by Thomas Jefferson. Naturally, on this made-up foodie holiday, there are plenty of deals and freebies pretty much everywhere that sells ice cream. So here's your chance to indulge today. Stacey Lynn, CBS News.