Hydrogen peroxide is an antiseptic with some major cleaning power, so it's only fitting that it comes in handy when cleaning ...

When yeast was added to hydrogen peroxide, a chemical in the yeast causes a reaction in which the hydrogen peroxide breaks apart to form oxygen gas and water. The oxygen was in the bubbles you saw.

The cells in our bodies are like bustling cities, running on an iron-powered system that uses hydrogen peroxide (H₂O₂ ... destructive molecules that attack DNA and RNA indiscriminately.