What do we know about the interior of the Earth?
Listen to hear the answer....

Kasatochi Volcano Erupts Explosively
Kasatochi Volcano in Alaska's Aleutian Islands is erupting, so USGS volcano scientist Marianne Guffanti fills us in on the situation....

What are sinkholes?
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What is the difference between "magma" and "lava"?
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What is marine geology?
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What's Up With Sinkholes?
A huge sinkhole in Texas begs a few questions about this fascinating and sometimes hazardous phenomenon, so we sit down with USGS geologist Randy Orndorff to learn more....

What is Devils Hole?
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What do I do if I think I found a meteorite impact crater?
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Earthquake in the Midwest
A magnitude-5.2 earthquake struck in southern Illinois on April 18, 2008. Harley Benz, Scientist-in-Charge at the USGS National Earthquake Information Center, fills us in with the details....

3 to 4.3 Billion Barrels of Oil in North Dakota and Montana
The USGS has determined that the Bakken Formation, in North Dakota and Montana, has 25 times more technically recoverable oil than was estimated in the USGS's 1995 assessment. We sit down with USGS scientists Brenda Pierce and Rich Pollastro to learn more....

What is Fool's Gold?
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What do we know about the interior of the Earth?
Listen to hear the answer....

Opening a Dam to Study and Improve Resources in the Grand Canyon
Dams don't help just by holding water back. By opening Glen Canyon Dam's jet tubes for a high flow experiment—scheduled to take place on March 5—scientists can study and improve resources in Grand Canyon National Park. Learn more by listening to our interview with John Hamill, USGS G...

The Unusual Suspects
Three scientists talk about lesser-known topics that were brought to light in the media in 2007 by the USGS Science Picks, including the loss of coastal wetlands, leaping carp, and evolutionary teamwork. We also preview CoreFacts, the quick science Q & A we'll offer every weekday start...

Significant Potential for Undiscovered Resources in Afghanistan
We talk with USGS's Stephen Peters about the newly released preliminary assessment of non-fuel mineral resources in Afghanistan and how they're a critical part of rebuilding its natural resource sector and economic stability....