You should move around, eat or drink something warm, and go to the bathroom before you go to bed. Hypothermia is a condition in which the body is cooling from the inside out.
Frostbite is when the body's skin tissue is freezing or already frozen.
It didn't seem like anyone else did either. I found many people in the lab working and others discussing travel to their remote field sites or the Pole. The day was partly sunny when it began for me, but by mid day we were again in Condition 2. Many researchers who are trying to get to their sites have been put behind schedule for two to four days now because of the weather.