USA TODAYStoned Age: Native American art confirms hallucinogenic drug useNov 23, 2020Doyle RiceBy Doyle Ricebookmark_bordersharemore_vert
National Geographic400 years ago, visitors to this painted cave took hallucinogensNov 23, 2020Megan GannonBy Megan Gannonbookmark_bordersharemore_vert
Livescience.comPinwheel Cave rock art in California may depict hallucinogenic 'trance flower'Nov 23, 2020Laura GeggelBy Laura Geggelbookmark_bordersharemore_vert