A special type of glass that changes color in different wavelengths of light, called photochromic glass, holds promise for stable, reusable data storage. Now, researchers have developed a doped ...

Price: £66 / $82.10 / €79.25 Weight: 23 grams - actual Colours: Crystal (photochromic) / Black-Red / White-red I’ve been riding in the Galibier Grand Tour optics sunglasses for the majority of the ...