“ Landing by capsule can make a lot more sense than landing by shuttle. Wings on a spacecraft are dead mass and/or a big problem for 99% of its... (read full comment) ” 

Posted on August 30, 2010 at 2:42 PM EDT

“ We Americans love our tests, even if they make us sicker. (read full comment) ” 

Posted on March 31, 2010 at 1:18 PM EDT

“ Unless Nissan is taking a HUGE bath on the Leaf, no way are they going to have an end-user cost of $20,000. The batteries themselves are going to... (read full comment) ” 

Posted on December 15, 2009 at 4:49 PM EST

+ 1 more comment posted in this discussion

“ a scam This specific case is in all likelihood a complete scam. The assistant is the one decides what gets said, not the patient. (read full comment) ” 

Posted on November 30, 2009 at 12:50 PM EST

“ Laser climbers Not sure about the other two teams, but LaserMotive has some ties to MIT, the project manager being an alum of the Rocket Team. (read full comment) ” 

Posted on November 5, 2009 at 11:46 AM EST

“ Levitation is not zero gravity You can hold someone up with a magnetic field. You can also hold someone up with wires, or with a table. None of... (read full comment) ” 

Posted on September 14, 2009 at 2:49 PM EDT

“ Nuclear propulsion You don't need Project Orion to use nuclear power for propulsion, or even little mini-bombs. A... (read full comment) ” 

Posted on August 17, 2009 at 2:47 PM EDT

“ intermediate platform There really isn't a point "between" Mars and Earth where you could put a station, although you could probably something... (read full comment) ” 

Posted on August 12, 2009 at 5:16 PM EDT

“ Re: affect Both of affect and effect are both nouns and verbs. http://xkcd.com/326/ http://www.wsu.edu/~brians/errors/affect.html (read full comment) ” 

Posted on April 14, 2009 at 4:56 PM EDT