Step into the hidden science lab in your kitchen with five easy experiments that explain refraction, surface tension, ...

In the third of three STEM experiments, Coolidge High School science teacher Jonte Lee teaches students how to make invisible ink using ingredients that can be found around the home. Check out our ...

Which invisible ink pens are best? Spies and conspirators have used invisible inks for millennia to send messages. In the modern age, invisible ink pens are an excellent way for grown-ups to ...