The story of how humans evolved is a long and winding one — and it grows more complicated with each passing year.

The Frozen Ground Under Threat Permafrost is like Earth's ancient freezer, stretching over vast regions, mainly near the ...

Understanding Permafrost and Its Global Distribution Permafrost, a layer of soil that remains frozen year-round, covers an ...

Waking up cold. Freezing while sitting for any length of time as the circulation slows.