First, she pours a spoonful of baking soda over a sliced lemon. Turning it over, she uses the lemon as a sponge to scrub her electric stovetop. After going over the stove once, she adds more ...
In the Middle Ages mixtures of lemon juice and vinegar would be used to write an invisible message ... But first, let’s do one of our favorite invisible ink experiments that uses the science of pH.
January 14, 2025 • Syria's new rulers faces one of their first serious challenges: bread lines. For Syrians, the long wait is a struggle — but for some, bread is a business opportunity.