| When Parents Scream Against Ice Cream In a greener, more health-conscious, unsafe world, the ice cream man has lost some of his mojo. nytimes.com |
On the Web--November 9 In-Depth Report Galileo and the International Year of Astronomy [More] rss.sciam.com |
Climate Numerology: How Much Atmospheric Carbon Dioxide Is Safe? Last December world leaders met in Copenhagen to add more hot air to the climate debate. That is because although the impacts humanity would like to avoid--fire, flood and drought, for starters--are pretty clear, the right strategy to halt global warming is not. Despite decades of effort, scientists do not know what “number”--in terms of temperature or concentrations of greenhouse gases in the atmosphere--constitutes a danger.When it comes to defining the climate’s sensitivity to forcings such as rising atmospheric carbon dioxide levels, “we don’t know much more than we did in 1975,” says climatologist Stephen Schneider of Stanford University, who first defined the term “climate sensitivity” in the 1970s. “What we know is if you add watts per square meter to the system, it’s going to warm up.” [More] rss.sciam.com |
Metro Motivation: GM Envisions Networked Mini Cars for City Streets As drivers await the arrival of General Motors's much-anticipated Chevy Volt plug-in hybrid car later this year, GM unveiled an electric vehicle of an entirely different stripe on Wednesday at the World Expo 2010 in Shanghai . The company's Electric Networked Vehicle (EN-V) is a mini electric vehicle built for two, unless you are using it to go shopping, in which case you might have room for yourself and a bag of groceries. [More] rss.sciam.com |
Metropolitan Diary Opera on a rustic park trail and portraiture in a subway car demonstrate that in New York, art is never very far away. nytimes.com |