Incredibly detailed map reveals forest biomass in the United States

In the last several hundred years, human activity has shifted large quantities of the world's carbon from long-term storage (i.e. carbon bound up in rocks, fossil fuels, and forests) into forms of short-term storage such as croplands and pastures, which tend to store less carbon for shorter periods of time. » 1/19/12 7:40am 1/19/12 7:40am

A Haunting Photograph of the Fall Equinox From Space

The September equinox occurred this morning at 5:05 am EDT, marking the official start of Fall for those of us in the Northern Hemisphere. Twice a year, during the latter halves of March and September, every person on Earth experiences the effects of an equinox in the form of a 12-hour day followed by a 12-hour night. » 9/23/11 10:59am 9/23/11 10:59am