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Supervolcanoes: Not a threat for 2012

The geological record holds clues that throughout Earth's 4.5-billion-year lifetime massive supervolcanoes, far larger than Mount St. Helens or Mount Pinatubo, have erupted. However, despite the claims of ...

Nov 15, 2011 4.3 / 5 (6) 17

Using biochar to boost soil moisture

Scientists at the U.S. Department of Agriculture (USDA) are leading the way in learning more about "biochar," the charred biomass created from wood, other plant material, and manure.

Nov 08, 2011 not rated yet 2