This might be one of the most well-informed and articulate researchers on the subject from all angles, Dr. Russell Blaylock. This 4-part video is packed with information, crystal-clear.
Part 1
[youtube:y6fznjmm]http://www.youtube.com/watch?v=–nWrqIspnQ[/youtube:y6fznjmm]
Part 2
[youtube:y6fznjmm]http://www.youtube.com/watch?v=nnaiubVJv8E[/youtube:y6fznjmm]
Part 3
[youtube:y6fznjmm]http://www.youtube.com/watch?v=ktcoJW6mj1U[/youtube:y6fznjmm]
Part 4
[youtube:y6fznjmm]http://www.youtube.com/watch?v=w5E2N4pliXs[/youtube:y6fznjmm]