Scientists Discovered A Ticking Time Bomb Throughout Alaska’s Underground

There, Scientists Study Permafrost

At the CRREL in Alaska, scientists were studying permafrost. Permafrost is any ground that remains frozen (under 32°F) for at least two years.

A diagram shows layers of permafrost underneath the ground.
QAI Publishing/Universal Images Group via Getty Images
QAI Publishing/Universal Images Group via Getty Images

Although permafrost is usually underground, it does not have to be solid. It has several layers, even some with moist soil. Permafrost even occurs underneath lakes and oceans.