retro-gay: Diatoms are a major group of algae and these small organisms are unique because their cel
retro-gay: Diatoms are a major group of algae and these small organisms are unique because their cells walls are made of silica. This hard cell wall helps to preserve their interesting geometric forms.The Victorians became enamored with the microscopic world and began painstakingly arranging the tiny diatoms (average size 0.5 mm) into kaleidoscopic arrangements. And some of them could be quite intricate.Source: strawberrysleep at: http://imgur.com/gallery/8U70W -- source link