The Dangers of Rocks
Wednesday, April 29, 2009 - 16:22
in Earth & Climate
If you're tired of fretting about swine flu, here's something else to think about: dislodged "ear rocks" -- loose crystals made of calcium carbonate that can cause dizziness. These little guys are usually valuable, helping us stay balanced, until an injury or virus triggers a "rock slide." Also in today's links: a levitating air conditioner, horse surgery, and more. read more