Some in-person instruction will be required to maintain a student visa, and universities must tell the US government of their plans to open by July 15.

Warming temperatures threaten reindeer herding and the preservation of cultural artifacts in Mongolia.

A new analysis finds that ice melt in Greenland and Antarctica could lead to increases of 2 meters by the end of the century if carbon emissions are not reduced.

Researchers describe the first known bacterial adhesion molecule that binds to frozen water. 

How one bacterium turns water into ice at nonfreezing temperatures