The crust of the earth is thin - a bit like the skin of an apple.The crust is made from solid rock in the form of tectonic plates. Tectonic plates float on the semi-solid mantle, which moves very ...

There's a rare form of contact dermatitis that does ... You may develop blisters that ooze and crust, hives, and raw skin from scratching. How long does it take for allergic reaction to go away?