There has also been speculation that mind altering gases inspired the prophecies of the Orcle at Delphi: "Recent geological investigations have shown that gas

There has also been speculation that mind altering gases inspired the prophecies of the Orcle at Delphi: "Recent geological investigations have shown that gas emissions from a geologic chasm in the earth could have inspired the Delphic Oracle to "connect with the divine." Some researchers suggest the possibility that ethylene gas caused the Pythia's state of inspiration. Traces of ethylene have been found in the waters of the Castallian spring, which is now largely diverted for the town water supply of the town of modern Delphi. However, Lehoux argues^ that ethylene is "impossible" and benzene is "crucially underdetermined." Others argue instead that methane might have been the gas emitted from the chasm, or CO[2] and H[2]S, arguing that the chasm itself might have been a seismic ground rupture."[1] [1] - https://en.wikipedia.org/wiki/Delphic_oracle#Fumes_and_vapors https://en.wikipedia.org/wiki/Delphic_oracle#Fumes_and_vapor...