Long-lived tortillas

If you can never seem to finish off a whole bag of tortillas before they go stale, Ralph Waniska may have just the thing for you. "By mixing the right proportions of ingredients and changing the structure of the tortilla when it's baking," the Texas A&M University food scientist has created tortillas with a shelf life of one month -- after the package is opened. Even NASA doesn't have those, although it does have tortillas that remain edible for nine months as long as they stay sealed.