James Randi is a leader in the skeptical community who has been debunking paranormal and supernatural claims for most of his life.  A magician himself James Randi is excellent at exposing the frauds that make up the paranormal and psychic communities. He offers a one million prize to anyone who can prove a paranormal claim scientifically and to this day nobody has won the money. Sylvia Browne has been ducking him for quite some time.