from the cheap-tricks-are-the-best-kind dept.
Soychemist writes "Print some thermochromic ink onto a sheet of paper, put metal heating elements on the other side, and you have a rudimentary color-changing display. Chemists in the Whitesides Group at Harvard think that the devices could be used to provide a simple readout from cheap medical tests and kits that check water for pollutants. In the past year, the same scientists have made a three-cent medical test and improvised a centrifuge with an egg beater. Their aim is to invent useful gizmos with everyday materials."
FORTUNE'S FUN FACTS TO KNOW AND TELL:
A black panther is really a leopard that has a solid black coat
rather then a spotted one.