“ I wonder... How much work could you conceivably get out of this? Casimir cars, anyone? :) (read full comment) ” 

Posted on December 6, 2011 at 8:33 AM EST

+ 1 more comment posted in this discussion

“ Bluetooth ... yay.. Yet another way for someone to hack your phone. Yippee. Bluetooth is a security nightmare. (read full comment) ” 

Posted on September 21, 2011 at 9:25 AM EDT

“ So what does that actually mean? "The elctromagnetic field simply diverges" would look like what in the real world? (read full comment) ” 

Posted on July 26, 2011 at 9:22 AM EDT

“ Of course humans aren't *the* cause of climate change; we are *a* cause, along with the entire climate system in general. However we *are*... (read full comment) ” 

Posted on May 3, 2010 at 7:40 PM EDT

“ The tensile strength on an elevator would be in the gigapascal range, the higher the better to keep the ribbon mass down. (read full comment) ” 

Posted on April 27, 2010 at 12:22 PM EDT

“ Step change acceleration The article said that flybys of Earth cause a step change in acceleration - is this just Earth, or other bodies as well?... (read full comment) ” 

Posted on July 29, 2009 at 9:38 AM EDT

“ What happens behind the mirrors? I'm wondering what happens behind the mirrors after the reflection takes place - have they just deflected... (read full comment) ” 

Posted on March 24, 2009 at 10:26 AM EDT