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Many patterns in nature are formed by cracks in sheets of materials. These patterns can be described by Gilbert tessellations, [85] also known as random crack networks. [86] The Gilbert tessellation is a mathematical model for the formation of mudcracks, needle-like crystals, and similar structures.
Macro photography of a natural snowflake. A snowflake is a single ice crystal that is large enough to fall through the Earth's atmosphere as snow. [1] [2] [3] Snow appears white in color despite being made of clear ice. This is because the many small crystal facets of the snowflakes scatter the sunlight between them. [4]
Yields: 16 servings. Prep Time: 10 mins. Total Time: 20 mins. Ingredients. 3 tbsp. unsalted butter. 1 (10-oz.) bag mini marshmallows. 1/2 c. plus 1 Tbsp. milk powder ...
The hexagonal snowflake, a crystalline formation of ice, has intrigued people throughout history.This is a chronology of interest and research into snowflakes. Artists, philosophers, and scientists have wondered at their shape, recorded them by hand or in photographs, and attempted to recreate hexagonal snowflakes.
The first is the "bubble method", [2] where a glass marble is turned into liquid and then blown into a bubble. It is then smashed into glass flakes and sieved by particle-size distribution. The second method is the "centrifuge method", [3] in which high-temperature liquid glass in a rotating tub creates glass flakes due to the centrifugal force.
The stained glass of Islam is generally non-pictorial and of purely geometric design, but may contain both floral motifs and text. Stained glass creation had flourished in Persia (now Iran) during the Safavid dynasty (1501–1736 A.D.), and Zand dynasty (1751–1794 A.D.). [27]