Onions make you cry because they release a chemical gas called syn-propanethial-S-oxide when their cells are cut open. This gas irritates your eyes and triggers tear production as a protective response.

Tap to flip back

Spicy food tastes hot because capsaicin, a compound in chili peppers, activates pain receptors in your mouth that normally respond to heat. Your brain interprets these pain signals as a burning or hot sensation, even though the food isn't actually hot.

Tap to flip back

Bread dough rises because yeast cells produce carbon dioxide gas as they eat sugar and multiply. This gas creates tiny bubbles throughout the dough, making it expand and become lighter and fluffier.

Tap to flip back

Paraloid B-72 is an acrylic resin commonly used in conservation because it is reversible, transparent, and resistant to yellowing over time. It forms a protective coating that can be removed without damaging the original object.

Tap to flip back

Paraloid B-72 is an acrylic copolymer made from ethyl methacrylate and methyl acrylate monomers. It is a thermoplastic resin commonly used in conservation and restoration work.

Tap to flip back