Honey Is the Only Food That Doesn't Spoil

Archaeologists have found 3,000-year-old honey in Egyptian tombs that was still perfectly edible. Honey's indefinite shelf life comes from its chemistry: low moisture content, high acidity, and hydrogen peroxide production create an environment hostile to bacteria and microorganisms. As long as it's kept sealed and dry, honey never expires.

Source: National Honey Board; various food science journals