Fascinating new option from Google for the search results. You can filter the search results by reading levels. They did this by analysing pages from Google Scholar and similar pages and comparing the statistical output to the other sites in Google’s index. Access this in Advanced Search>Reading Levels. A very helpful addition for academic research, help you filter a lot of the crap when doing some basic search on a new topic.
You can also get some funny information’s by limiting the search to specific site. A few examples below.