Geography
How Thermokarst Lakes Form and Evolve in Permafrost Terrains
Quick fact
Thermokarst lakes can expand at rates of up to tens of meters per year, and their formation accelerates permafrost thaw, releasing greenhouse gases that further warm the climate—a powerful positive feedback loop.
Why this is interesting
Imagine a landscape that looks solid, but when you step on it, it sinks like a quicksand. In permafrost regions, this instability can create entire lakes—and they're growing before our eyes.