Psychedelic experience sources of some psychedelic drugs such as ayahuasca and mescaline-containing cacti are sometimes referred to as "plant teachers". Similarly, in a follow-up to the psilocybin and mysticism study at Johns Hopkins, researchers observed that psilocybin: "occasions personally and spiritually significant mystical experiences that predict long-term changes in behaviors, attitudes and values". Psychedelic experience includes the full range of mystical or religious experiential phenomena. Two scientific studies have concluded that psilocybin (a typical psychedelic compound that occurs naturally in psilocybin mushrooms) reliably triggers mystical-type experiences. The more recent study at Johns Hopkins University identified mystical experiences by means of several questionnaires
Several Species of Small Furry Animals Gathered Together in a Cave and Grooving with a Pict Large Fuzzy Mammals Gathered Together at a Rave and Schmoozing with a Brick" is based on this song. A quotation in the Karl Edward Wagner novel "Bloodstone" (1975) pays tribute to the song: "several species of small furry animals gathered together in cave and grooving with a pict." Several Species of Small Furry Animals Gathered Together in a Cave and Grooving with a Pict "Several Species of Small Furry Animals Gathered Together in a Cave and Grooving with a Pict" is a track written and performed by Roger Waters from the 1969 Pink Floyd double album, "Ummagumma". It also holds