Earth Observation
Satellites Show How the Earth is Warming Up
NASA satellites have been used to create an 18-year record of temperatures on the Earth's surface, and not surprisingly, they're…
Field Reversal Takes 7,000 Years
Scientists have known for a long time now that the Earth's magnetic field unexpectedly reverses polarity over long periods of…
Yangtze River From Space
The European Space Agency's Envisat satellite took this latest image of the mouth of the Yangtze River; the longest river…
New Research Helps Explain Dust Bowl Drought
Scientists think they have an explanation for the "dust bowl" droughts of the 1930s, which helped to cause the Great…
Tracking Diseases from Space
More than a million people die from malaria every year, a disease spread by mosquitoes. Epidemics happen when environmental conditions,…
Santa Ana Winds Stimulate Marine Environment
The Santa Ana winds, which blow across Southern California, are known to cause dry, fire-hazard conditions inland. But new data…
NASA Finds Smoke Can Choke Clouds
Using data from NASA's Aqua satellite, scientists have found that the smoke from burning vegetation can inhibit the formation of…
Nasca Lines Imaged from Orbit
The European Space Agency's Proba spacecraft imaged the Nasca region of Peru; famous for its giant lines and animal figures.…
Valentine’s Day Greeting from Envisat
The European Space Agency has picked a special image taken by Envisat for Valentine's Day. The radar image is of…
Cities on Fertile Land Affect Climate
New research from NASA shows that cities in the United States have been built on the most fertile soils of…