Using a special printer and a drop of optical-quality glue, Stanford University bioengineer Manu Prakash has invented a way to turn a piece of paper into a microscope. The printer prints a precise diagram instructing how to fold the paper, and the glue acts as a lens. With a little effort, a microscope is created—and all for under a dollar. With applications from schools to …
$1 Fold-Up Microscope
