But the chemistry that makes them work is pretty simple, which led [Markus Bindhammer] to these experiments ... iodine and starch can be used as a reagent to detect peroxide. A tiny drop of ...

Listen to more stories on the Noa app. Juli Gittinger keeps a bag packed with iodine pills and a machete. “It’s good for getting through brush,” she explained to me recently. Gittinger’s ...