Club soda and sparkling water start with identical carbonation, but one goes flat first because of what else is dissolved in it.

Dry ice skips the liquid phase entirely because of basic physics — and a widening CO2 supply gap is turning that same physics into a shipping headache.

Unpopped "old maids" aren't random. A Purdue food chemist found the difference between a good popper and a dud comes down to moisture and a kernel's cellulose hull.

Clear glass looks appealing on a shelf, but for olive oil it's a slow-motion quality problem. Here's the food chemistry behind the dark bottle, and where even dark glass falls short.

The shiny and dull sides of aluminum foil come from a manufacturing quirk, not a cooking rule — and lab tests show almost no difference between them.