geology The ocean's salt could blanket the Earth's land surface in a whopping 500-foot layer Mark Frauenfelder
weather What's with those creepy weird blue lights accompanying the Mexico earthquake? David Pescovitz
Science Amazing interactive globe shows the very different location of your city 750 million years ago David Pescovitz
History Stonehenge core sample shows monument was largely quarried only 15 miles from site Rob Beschizza