|Citation: Politics and the Life Sciences, 2002, 21, 1, 26-36|
Civil violence is a complex and often horrific phenomenon whose characteristics have varied by era, setting, and circumstance. Its objective analysis has rarely been feasible at spatial and temporal scales great enough and resolutions fine enough to reveal patterns useful in prevention, intervention, or adjudication.
|Item Type: Satellite Imagery
Data Type: Raster
The Global Land Cover Facility (GLCF) provides earth science data and products to help everyone to better understand global environmental systems. In particular, the GLCF develops and distributes remotely sensed satellite data and products that explain land cover from the local to global scales.
Wild insects pollinate major agricultural crops—from cotton to blueberries—more effectively than hives of honeybees managed by humans, according to a massive international study.
In their report in the 1 March issue of Science, Lucas Garibaldi of Universidad Nacional de Río Negro in Argentina and colleagues also conclude that honeybees only add to the pollinating power of the wild insects, and can’t replace their pollination services.
All the major regions of the polar ice sheets except one have been losing mass since 1992, according to a study that pulls together several independent measurement methods.
All told, mass loss from the polar ice sheets has contributed 11.1 +/- 3.8 millimeters to global sea level since 1992, researchers report in the 30 November issue of the journal Science. This is roughly 20% of the total global sea level rise during that period.
An educational Web site called Earth Exploration Toolbook (EET) has been tapped to win the prestigious SPORE award by the journal Science. Like a key to the kingdom, EET provides students with all they need to enter the world of real scientific data.
“Using real data allows students to see a real connection between science and the world,” said Tamara Shapiro Ledley, EET’s principal investigator and a former climate researcher. “Too often data sets can only be understood by scientists themselves. That’s where Earth Exploration Toolbook comes in.”
An analysis of language from around the world suggests that human speech originated—just once—in central and southern Africa. This verbal communication then likely spread around the globe, evolving alongside migrating human populations, according to the new research.
Civilian deaths in the decade-old war in Afghanistan are rising, largely the result of indiscriminate attacks by insurgents who are battling soldiers from the United States and other nations in the International Security Assistance Force, according to data released for the first time to the journal Science. The data, detailed in a report by correspondent John Bohannon, show that the international forces are causing a shrinking share of the civilian casualties even as their troop numbers and combat operations have surged.
While it is generally agreed that federal investment in scientific research is crucial for American prosperity and innovation, specialists lack rigorous tools and methods to fully assess the impacts of such investment, a top AAAS official told a congressional panel recently.