Cicadas spend years underground and come out once in a blue moon for a frenzy of activity. But certain broods, like the one that emerged in 2004, come out like clockwork every 13 or 17 years. In this Science Update, you'll hear what's so special about these numbers. Why cicadas come out in their prime.
Product Information. Gluma Desensitizer - Heraeus Kulzer is a simple, one-step chairside procedure for treating and preventing dentin hypersensitivity. Gluma is the most well-known and trusted desensitizer in the dental industry world wide. Used in over 50 million restorations, GlumaÂ® Desensitizer is preferred over all others for preventing and eliminating hypersensitivity. Just one drop of Gluma is all you need and the results are fast and effective.
Glittering surfaces have been found to be used since prehistoric times in the arts and in cosmetics. The modern word âglitterâ comes from glitra in Old Norse through Middle English. However, as early as 30,000 years ago, mica flakes were used to give cave paintings a glittering appearance. Prehistoric humans are believed to have used cosmetics, made of powdered hematite, a sparkling mineral.