I honestly could not tell you the last time I had a Big Mac from McDonald's. In the pantheon of vile fast food sandwiches, the "two all beef patties, special sauce, lettce, cheese, pickles, onions on a sesame seed bun" has never done anything for me.
That doesn't stop the Golden Arches from selling millions of them every year, though. The Big Mac is now 40 years old (just like a certain food and drink blogger!) and here's an article about its history and impact on America's waistline.