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How hobbyists replicate lab-grade microscopes at home

I built a 3D printed, scanning laser confocal microscope so I could collect 3D surface topology and profilometry data! The ...
Nature

The life and times of the LED — a 100-year history

Many people believe that the LED was discovered by US researchers working in the 1960s. In fact, Henry Round at Marconi Labs noted the emission of light from a semiconductor diode 100 years ago and, ...
The New York Times

The Best Online Photo Printing Service

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Phil Ryan Phil Ryan is a writer primarily covering photography gear, printers, ...