Scientists Say: Permafrost
This soil gets cold and stays cold

This is a tunnel into permafrost outside of Fairbanks, Alaska. The walls on either side have been frozen solid for up to 25,000 years.
B. Brookshire/SSP
This soil gets cold and stays cold
This is a tunnel into permafrost outside of Fairbanks, Alaska. The walls on either side have been frozen solid for up to 25,000 years.
B. Brookshire/SSP