Researchers have come up with a microscopic microscope, tiny enough to fit on a fingertip, that can be cheaply mass-produced and used to scan blood and water for pathogens. The high-resolution ...

It’s relatively easy to understand how optical microscopes work at low magnifications: one lens magnifies an image, the next magnifies the already-magnified image, and so on until it reaches the eye ...

In the late 17th century, a Dutch draper and self-taught scientist named Antonie van Leeuwenhoek earned renown for building some of the best microscopes available at a time when the instrument was ...