Scientists have created a new tool to measure acidity in water. This tool is better than old ones. It uses a special gel and a smart probe. The probe has two parts that change when acidity changes. This makes the tool very accurate. Old tools had problems. They were not very accurate. They could be tricked by other things in the water. The new tool fixes these probl...

Scientists have created something cool: new tools that can spot harmful metals in water. These tools are special because they can tell the difference between zinc, cadmium, and mercury. Plus, they do this in water, which is a big deal. What makes these tools even better is that they are easy and cheap to make. They only need two steps and start with stuff that's alr...