working replicas of expensive scientific equipment

Working replicas of expensive scientific equipment could be made for a fraction of conventional cost using cheap 3-D printers, possibly saving developing world labs thousands of dollars each time, says a researcher whose book on the subject was published last year. This and similar advances mean the age of appropriate technology — affordable, sustainable solutions designed and built to meet local needs — may be here, argues Joshua Pearce, a materials science and engineering professor at Michigan Technological University, United States, in an article in Physics World magazine.