Most commonly, patients describe acute tenderness in the buttock and sciatica-like pain down the back of the thigh, calf and foot. Typical piriformis syndrome symptoms may include: 1  A dull ache in the buttock. 2  Pain down the back of the thigh, calf and foot (sciatica).
We think of ice as snowflakes, ice cubes, snow cones, and dangerous patches on the sidewalk. Scientists have many different ways of categorizing ice too! There are actually fourteen types of ice that exist in different environments.
There are different kinds of glacier and they change over time. Eighty five per cent of the world's ice is found in the giant Antarctic ice sheet. This ice sheet would cause the earth's oceans to rise by seven metres if it melted. Ice caps cover less area than ice sheets. The Himalayan ice cap is home to Mount Everest, the world's highest mountain.