Popular Mechanics USA — January 2009
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Popular Mechanics South Africa — May 2013
Popular Mechanics USA — February 2006
Popular Mechanics USA — September 2005
Popular Mechanics USA — March 2005
Zeit Wissen — Februar-Marz 2013
Popular Mechanics USA — August 2004
Popular Mechanics USA — August 2010
Popular Mechanics USA — June 2005
Popular Mechanics USA — March 2009
Popular Mechanics USA — Winter 2006
Popular Mechanics USA — December 2005
Popular Mechanics USA — November 2008
Popular Mechanics USA — November 2005
Popular Mechanics USA — September 2009
Cell — 14 March 2013
Popular Mechanics USA — July 2009
Popular Mechanics USA — February 2009
Popular Mechanics USA — February 2010
Popular Mechanics USA — October 2010
Popular Mechanics USA — May 2010
Popular Mechanics USA — May 2004
Popular Mechanics USA — April 2006
Popular Mechanics USA — May 2013
Discover — July-August 2011
Popular Mechanics USA — January 2010
Popular Mechanics USA — October 2008
Popular Mechanics USA — May 2005
Cell — 25 April 2013
Popular Mechanics USA — June 2009
Popular Mechanics USA — April 2005
Popular Mechanics USA — September 2008
Popular Mechanics USA — September 2010
Servo — September 2011
Popular Mechanics USA — June 2004
Popular Mechanics USA — January 2011
Zeit Wissen — Dezember-Januar 2013
Cell — 18 March 2013
Servo — March 2012
