Graham Hancock gives a lecture about the ancient notions of eleves, angels and aliens and connects them with the shamanistic usage of Ayahuasca and other psychotropic plants. He presents lots of very interesting and exciting information during his talk- did you know for instance that Siberian shamans drink the urin of reindeer who have been fed fly agaric to improve the effect of this mushroom?. Definitely a triptamine expert speaking here and therefore a video really worth watching for those interested in this issue!