“ Stem cell ethics There is a component of stem cell ethics that never seems to be discussed. That is the ethics of using fetal stem cells is... (read full comment) ” 

Posted on August 24, 2010 at 6:20 PM EDT

“ tweeks and ideas The use of LCD technology limits the frequency, and therefore the number of viewers. The DLP aims the lasers at different parts... (read full comment) ” 

Posted on June 11, 2010 at 3:24 PM EDT

“ Solar infrastructure costs This is an encouraging article. The biggest challenge facing solar power is the cost of infrastructure. The cost and... (read full comment) ” 

Posted on January 5, 2010 at 11:36 AM EST

“ Shale gas I disagree that this is a puff piece produced by the natural gas industry. It's a very brief summary of major events in energy in the... (read full comment) ” 

Posted on December 30, 2009 at 3:40 PM EST

“ Renewables, the best choice? The subject of global warming has become so politically charged that actual constructive debate is very difficult,... (read full comment) ” 

Posted on September 24, 2009 at 12:30 PM EDT