The marker writes in blue ink, but when it’s exposed to temperatures exceeding 150 degrees Fahrenheit—like from a hot beverage inside a paper cup—it changes to green, letting you know your ...

This article is more than 5 years old. Scientists in Germany have developed three different tattoo dyes that change color based on the levels of certain health markers in the blood.

In this video, I take on the classic three marker challenge—but with a creative twist. Using only three randomly selected ...

These products promise to change color in response to certain disease markers in a cat’s urine, to help owners spot early signs of illness before more serious symptoms arise.

Making this Color Change Chameleon is a fun way to add color to any day. You’ll need: 2 paper plates, markers, a ruler, a craft knife, glue and a brad to hold the plates together.