The TellerScan TS250 UV is the latest in ultraviolet image capture from Digital Check Corp., a high-speed UV cheque scanner ...

The science pros at The King of Random show how to make invisible ink at home with simple materials.

For this project you need few pieces of cardboard, a torch and webcam with manual focus, all you need - install the lens by the reverse side and build a body for your future microscope. As better ...