If you haven't heard of ayahuasca, you may soon. While once consumed mainly by natives of the Amazon basin, today, thousands visit Latin American countries every year to imbibe it, with the hopes of seeing profound visions, having religious experiences and?"many claim?"undergoing immense healing. Ayahuasca now has devoted followers throughout the world. Kilham, who calls himself the "medicine hunter" and has traveled to and intermittently lived in the Amazon for more than two decades, says that he is a firm believer in the healing