TOP 100 CAMPING SITES
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| Scientific American reviews: How to Build a Dinosaur How to Build a Dinosaur: Extinction Doesn’t Have to Be Foreverby Jack Horner and James Gorman. Dutton, 2009 [More] rss.sciam.com |
The Role of Sunspots and Solar Winds in Climate Change Dear EarthTalk: Don’t some scientists point to sunspots and solar wind as having more impact on climate change than human industrial activity? -- David Noss, California, MD [More] rss.sciam.com |
Are Our Big Brains the Reason Newborns Can't Walk? Compared with other animals, human babies take much longer to learn to walk. Does this have something to do with our big brains? --Mahmoud Dhaouadi, via e-mail [More] rss.sciam.com |
Natural Gas Drilling Produces Radioactive Wastewater As New York gears up for a massive expansion of gas drilling in the Marcellus Shale, state officials have made a potentially troubling discovery about the wastewater created by the process: It's radioactive. And they have yet to say how they'll deal with it.The information comes from New York State's Department of Environmental Conservation , which analyzed 13 samples of wastewater brought thousands of feet to the surface from drilling and found that they contain levels of radium 226, a derivative of uranium, as high as 267 times the limit safe for discharge into the environment and thousands of times the limit safe for people to drink. [More] rss.sciam.com |
EPA Tightens NO2 Smog Standard U.S. EPA today strengthened the federal public health standard for nitrogen dioxide (NO2) pollution, a limit that has been in place for nearly four decades.The final rule introduces a new one-hour maximum standard for NO2 at 100 parts per billion (ppb), a level that EPA says will protect millions of Americans from peak short-term exposures. The agency is also retaining the existing annual standard of 53 ppb. [More] rss.sciam.com |