From fossil teeth to carbon traces of plants in the soil, scientists are studying how changes in climate may have influenced early human evolution in Africa..

Landscapes Beneath Our Feet

Mountains the size of the Himalayas once dominated the horizon west of the Hudson River. A massive lake rimmed with volcanoes and steaming vents once stretched from Lancaster, PA to New Haven, CT...

Why do earthquakes occur? Key to understanding this is knowing the strength of faults. Strong faults can sustain large stresses; weak ones fail under much lower stresses. 

"One of the really important aspects of science and what scientists here at Lamont do is they look at really long timescales. So I mean the earth is 4.6 billion years old and scientists here look at how climate and how the earth has changed over that time period "
-Heidi Cullen