New research finds the disappearance of glaciers in the Sierra Nevada will be unprecedented in the human history of North ...

Archaeologists are turning their attention to the depths of the Great Lakes. Recent discoveries suggest that during the Ice Age, when water levels were much lower, early peoples may have hunted and ...

A new model uncovers how Earth’s liquid core has sustained its magnetic field since the planet’s beginnings, offering new insights into its future. Earth benefits from the presence of a magnetic field ...

Humanity's first look at Earth from the moon didn't come until Aug. 23, 1966, when this grainy, black-and-white image showed our planet as a crescent above the lunar horizon, appearing to rise as the ...