This allows scientists to drill down and monitor pollution going back many years. At the south pole the ice from accumulated snow is almost 2 miles deep. Survival school is another name for Snow Craft school. We were taught how to use the emergency equipment. We did not have a formal classroom like you have, and most of the school was outside.
Silver City is near the school site which is called Snow Mound City.
They are not really cities, but just a few buildings. Silver City is no more than 2 buildings which are used for emergency shelter in the summer. In the winter, people go there to spend the night, to get out of town, and look at the stars. I have not talked with Zac in about a week, but we usually talk by phone at least once a week. Thanks for writing, Dave Hi Krystle, I am doing well.