NASA explains how global temperature is measured, revealing Earth's ever-increasing warming trend and why even small rises in temperature matter for our future.

During the most recent period in Earth’s past with a climate warmer than today, the tropical Pacific was in a stable state of El Niño-like conditions, according to a new study by researchers at the ...

The third volume of a series of reports dealing with systematic geology and paleontology of Maryland. William Bullock Clark, state geologist. Versos of several plates on which brief explanations are ...