Sicily Volcano Acts Up

Sicily Volcano Acts Up

Early in April 2013, Mount Etna in Sicily appeared whimsical, blowing smoke rings composed not of actual smoke, but of steam, volcanic gases and some volcanic ash. Then on April 18, the Advanced Land Imager on the Earth Observing-1 satellite observed additional activity.

California Cloud Highway Forms

California Cloud Highway Forms

On April 14, 2013, NASA's Terra satellite observed a striking cloud formation extending more than 600 miles from the California coast out across the Pacific Ocean. The cloudbank hugged the coastlines of California and Baja California, spanning hundreds of kilometers north to south and east to west.

A Volcano Changes Shapes

A Volcano Changes Shapes

Tolbchik Volcano isn't a single peak, but a complex of volcanic features superimposed on one another. The varied shapes result from differences in lava chemistry, gas content and temperature.

Australia's Dynamic Dunes

Australia's Dynamic Dunes

In northwest Australia, the Great Sandy Desert holds great geological interest as a zone of active sand dune movement and noticeable fire scars.

Dust Storm Shrouds Benghazi

Dust Storm Shrouds Benghazi

Somewhat symbolic of the lack of clarity surrounding a Sept. 11, 2012, terrorist attack on American citizens in Benghazi, a NASA satellite captured a massive dust storm over Libya's second-largest city on March 30, 2013.

No Rain, Few People”But Plenty of Uranium

No Rain, Few People”But Plenty of Uranium

The Namib Desert in southwestern Africa is one of the most inhospitable places on the planet. It rarely rains, and Namibia has the second lowest population density in the world, trailing only Mongolia. Yet something draws people deep into the desert, despite the harsh environment.

Cattle, Oil and  Snow?

Cattle, Oil and Snow?

Texas is known for many things, but snow on the ground typically isn't among them. This astronaut photo captures a late February 2013 record snowfall that left 17 inches of snow blanketing north Texas, just south of Amarillo.

Atmospheric Lows and Highs Create Catalina Eddy

Atmospheric Lows and Highs Create Catalina Eddy

On Feb. 17, 2013, NASA's Aqua satellite captured this natural-color image of an atmospheric eddy off the coast of Southern California. The swirling, circular cloud pattern is known to meteorologists as a Catalina eddy or coastal eddy.

Space Station's New EO Sensor Springs into Action

Space Station's New EO Sensor Springs into Action

Rio San Pablo, as it empties into the Golfo de Montijo in Veraguas, Panama, is the first light from the International Space Station's new ISERV Pathfinder Earth observation (EO) system. The image was acquired at 1:44 p.m. local time on Feb. 16, 2013. NASA hopes the new system will really make a difference in people's lives.

A Treasure Chest of Rare Metals

A Treasure Chest of Rare Metals

With uses ranging from jewelry to catalytic converters, platinum ranks among the most prized and expensive metals. About 70 percent of the world's platinum is mined in South Africa's Bushveld Igneous Complex, along with significant quantities of palladium, rhodium, chromium and vanadium.

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