The resulting graph, called the Keeling Curve (after Charles David Keeling, the scientist who kicked off the effort) is a ...

Warming in the Arctic is intensifying methane emissions, contributing to a vicious feedback loop that could accelerate ...

All of the Great Lakes, except for Lake Erie, are below their average water levels for this time of year due to a relatively ...

Sweeping funding cuts are undermining the innovation that has been a central part of US economic strength for decades ...