Antarctica's Blue Ice Height Increases

Antarctica's Blue Ice Height Increases

Field measurements in Antarctica's spectacular blue ice region validate the accuracy of the European Space Agency's CryoSat mission and show that this part of the ice sheet has increased in height.

Switchgrass the Next Biofuel?

Switchgrass the Next Biofuel?

Armed with satellite-derived data of Nebraska grasslands, U.S. Geological Survey scientists demonstrate high potential for growing biofuel crops with relatively little energy input and environmental impact.

Sense and Avoid for Drones Advances

Sense and Avoid for Drones Advances

Although still in testing phase, U.K.-based 2Excel says its system already does a better job than humans of detecting imminent drone collisions, a must-have capability for civil UAS acceptance.

Ice-Free Winter Stirs up Lake Erie

Ice-Free Winter Stirs up Lake Erie

After a nearly ice-free winter, along with more rain than snow, Lake Erie was filled with colorful swirls of suspended sediment and algae on the first day of spring 2012.

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April Issue 2024