Study Finds Key to Hallucinogenic Response
From NPR, National Public Radio
by Jon Hamilton
All Things Considered, January 31, 2007 · People have been taking hallucinogenic drugs for thousands of years. Now scientists think they've figured out a key mechanism that allows tiny amounts of substances like LSD to have a powerful effect on the brain.
(unfortunately, NPR did not print out the interview in it's entirety, but you can listen to the rest of the story here):