Since current methods for determining the optimum timing of nitrogen fertilizer application can be costly, time consuming, and difficult, wheat growers turn to aerial imagery to overcome economic, environmental challenges. (American Society of Agronomy release)

A study by University of Massachusetts Amherst geoscientist Robert DeConto posits an alternative theory regarding why Antarctica suddenly became glaciated 34 million years ago. The study challenges previous thinking about why the ice sheet formed and holds ramifications for the next several hundred years as greenhouse gases continue to rise. (University of Massachusetts at Amherst)

Climate change had little to do with the demise of the dinosaurs, but the last million years before their extinction had a complex pattern of warming and cooling events that are important to our understanding of the end of their reign, according to geologists. (National Science Foundation, Smithsonian, American Chemical Society)

Recent research has shown that increases in the height of the tropopause over the past two decades are directly linked to ozone depletion and increased greenhouse gases. (DOE/Lawrence Livermore National Laboratory release)

Rocks deposited by glaciers on mountain ranges in West Antarctica have given scientists the most direct evidence yet that parts of the ice sheet are on a long-term, natural trajectory of melting. (University of Washington release)

The flora and fauna are sending signals about the impact of global warming - a message that is being heard in backyards around the world. (Michigan State University release)

Global warming is having a significant impact on hundreds of plant and animal species around the world - although the most dramatic effects may not be felt for decades, according to a new study in the journal Nature. (Stanford University release)