The image by Matias Sauter Morera illuminates the rural Costa Rican cowboys who maintained an outward heterosexual identity while having secret trysts with men.

Buying the right camera, lens, accessory or software to suit your photography is really important. Our product reviews offer independent views with hands-on opinion and honest verdicts aimed to ...

Inspired by Nobel Prize-winning physicist Gabriel Lippmann’s emulsion technique, the technology stores data by capturing color waves in a durable silver halide emulsion. Johnson’s path to this ...

Explain why, in a test for halide ions, the sample is acidified with dilute nitric acid first. Carbonate ions also produce a white precipitate with silver nitrate solution. The acid reacts with ...