While it is possible to get worm densities up to as much as 20 kg/m 2 or 4 lbs per square foot (Edwards, 1999), the most common densities for vermicomposting are between 5 and 10 kg/m 2 (1 to 2 lbs per ft 2).
A massive open online course (MOOC) is a model for delivering learning content online to any person who wants to take a course, with no limit on attendance. A short video about MOOCs and the connected age. Recent Spotlight.
Berkeley will soon offer music classes on our platform, and the Swiss Federal Institute of Technology in Lausanne (EPFL) will provide French classes, explains Howard Lurie, vice-president of edX, a MOOC platform created by the Massachusetts Institute of Technology and Harvard as a non-profit organisation.