Oxygen's ups and downs in the early atmosphere and ocean

Most researchers imagine the initial oxygenation of the ocean and atmosphere to have been something like a staircase, but with steps only going up. The first step, so the story goes, occurred around 2.4 billion years ago, ...

Computer forecasting matched rises, ebbs in Afghanistan violence

In August 2010, shortly after WikiLeaks released tens of thousands of classified documents that cataloged the harsh realities of the war in Afghanistan, a group of friends - all computer experts - gathered at the New York ...

Fracking can cause earthquakes, but risk is low: study

Certain oil and gas operations that involve injecting wastewater underground can cause earthquakes, but the risk from hydraulic fracturing is generally low, said a US scientific report Friday.

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