There are a number of reasons why some countries publish more than others but it is no real surprise that the USA produces the most scientific papers. Over the period 1999-2009 there were 2.9 million scientific papers published in the USA according to Essential Science Indicators at Thomson Reuters (see infographic) (http://sciencewatch.com/dr/cou/2009/09decALL/). This is considerably more than the next two countries in the top 20…