Small earthquakes in Ohio and Arkansas associated with hydraulic fracturing for natural gas have taken many people by surprise. Gas industry executives say there's no hard evidence that their activities are causing these quakes. But some scientists say it's certainly possible; in fact, people have been causing quakes for years.
In the 1960s, geologists realized that gold mines in South Africa had created small earthquakes. Caverns dug into the earth thousands of feet below the surface collapsed. The "pancake" effect caused quakes — in one case a magnitude-5.2 temblor.
100 years ago yesterday, Norway’s Roald Amundsen beat England’s Robert Scott in man’s race to reach The South Pole. A mission of science propelled many of these early expeditions, and such inquiry continues as the remarkable endeavor of polar scientists today.
One hundred years ago Wednesday, Norwegian explorer Roald Amundsen and his team were the first to reach the South Pole on skis. Veteran traveler Felicity Aston is nearing another first: becoming the first woman to ski across Antarctica alone.
Reached by NPR by satellite phone early Wednesday morning, Aston was about a degree and a half — 100 miles — from the South Pole. For Aston, a degree is about four days skiing. She's been skiing for 20 days. Overall, Aston will travel about 1,000 miles.