A video shows St. Louis International Airport on Friday, April 20 as a tornado struck. Record numbers of tornadoes expected in the U.S. midwest and southeast.
Gallup survey shows that Americans are more likely to blame nature for global warming, the exception in a world where most residents blame human activity.
Scientists find that large earthquake clusters do not increase the global seismic hazard for other damaging earthquakes far from the main shock region.
Researchers have classified people into categories of bacterial ecosystems. Yes, you read that right. You're an ecosystem. One of three gut types possible.
Revkin said about the population on Earth, "A new way of thinking is required. The old messages of 'woe is me' and 'shame on you' are so 20th century."
From Wim Thomas: Energy demand is growing, as emerging economies demand their share. How might global energy supply and demand come to balance in the future?