Snowflake in the same micro-environment does not guarantee that each arm grow the same; indeed, for some crystal forms it does not because the underlying crystal growth mechanism also affects how fast each surface region of a crystal grows. Empirical studies suggest less than 0.1% of snowflakes exhibit the ideal six-fold symmetric shape. Very occasionally twelve branched snowflakes are observed; they maintain the six-fold symmetry. Snowflakes form in a wide variety of intricate shapes, leading to the notion that "no two are alike". Although nearly-identical snowflakes have been made in laboratory, they are very unlikely to be found in nature. Initial
How Do They Do It? Robert between the items. This series was not made available on Five's online video site. Episodes in this group aired with 30-minute runtimes (including commercials). On hiatus as of February 2014. How Do They Do It? How Do They Do It? is a television series produced by Wag TV for Discovery Channel. Each programme explores how 2 or 3 ordinary objects are made and used. The show's slogan is "Behind the ordinary is the extraordinary." The series is broadcast throughout the world on various Discovery-owned networks including: Series 1 and 2, which were co-produced with Rocket Surgery Productions, were narrated