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.
Many types of glaciers are fed by ice sheets, ice caps and ice fields. For instance, the Harding Icefield in the Kenai Mountains of Alaska feeds as many as 40 glaciers. Outlet glacier. An outlet glacier flows from the Penny Ice Cap on Baffin Island, Nunavut, Canada. (Photo: Michael Studinger/NASA)