lol, have you Googled it? it points me to many sources, including foodsafety.gov, usda.gov, and a University of Nebraska newsletter that say frozen food is good indefinitely as long as it's kept under 0°C the whole time, but, that the flavor and texture will generally be worse off 6-12 months after freezing depending on what item we're talking about. there's even an account of people eating 36,000 year old meat attributed to zoology professor Dale Guthrie from his book Frozen Fauna of the Mammoth Steppe(buy it from Amazon!): After successfully unearthing and preserving “Blue Babe,” a 36,000-year-old steppe bison found near Fairbanks in 1979, Guthrie’s team celebrates by simmering some leftover flesh from Babe’s neck “in a pot of stock and vegetables.” The author reports that “the meat was well aged but still a little tough, and it gave the stew a strong Pleistocene aroma.”
