I was using stumble today when I came across a site that houses scientific information, studies, journals, etc.
On the main page it read,
“Scirus is the most comprehensive scientific research tool on the web. With over 410 million scientific items indexed at last count, it allows researchers to search for not only journal content but also scientists’ homepages, courseware, pre-print server material, patents and institutional repository and website information.”
A quick search on just the word yoga came up with 924,904 results
http://www.scirus.com/srsapp/search?q=yoga&t=all&sort=0&g=s
Enjoy 