Health Detector
Scientist Hayat Sindi's device is the size of a postage stamp, and it costs just a penny. But it could save millions of lives. In many parts of the world, doctors and nurses work with no electricity or clean water. They have to send health tests to labs and wait weeks for results. But this little piece of paper could change that. It contains tiny holes that are filled with chemicals. These chemicals can detect health problems. A person places a single drop of blood on the paper. The chemicals in the paper change because of the blood and indicate whether or not the person has an illness.