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 to Have Sex in an Epidemic and the descriptions below should not be presumed to be the medical consensus." Callen, Berkowitz and Sonnabend begin this section by stating that, regardless of how controversial and subjective the question may be, some people with AIDS do continue to have sex after being infected, whether knowingly or unknowingly, although many may be so incapacitated that sex is "the furthest thing from their minds." The solution, they argue, does not involve treating people with AIDS (PWA) like lepers, as they are just as human as the rest of the population, desire the same human contact and will simply end up