Stoned Oracle at Delphi
nucal writes: "Acording to the NY Times (free registration required, etc.) the Oracles at Delphi were under the influence of ethylene gas when they made their prophecies. Archeologists and geologists teamed up to discover the 'mephitic vapours' that 'inspired divine frenzies.'"
Your 1980 English teacher might possibly even have read E. R. Dodds' The Greeks and the Irrational (1951) which, in addition to dismissing the vapor account as myth, gives a good statement of why it is irrelevant to trying to understand such phenomena:
The evidence supporting the "myth" is (relatively) new. Quite fascinating how geologist and author de Boer discovered the fissure in 1981 but, having read Plutarch, assumed it was already known and only in 1995 learned that it was not known to modern science while discussing it with archaeologist John R. Hale under the influence of some wine (which is when they resolved to team up and do a thourough investigation).
As an admirer of Dodds' scholarship, I also can't resist noting that of the 311 pages of the book, 129 comprise the 1099 annotations (three of which appeared in the citation above). Not quite hyperlinks, but enough in quantity and quality for me to judge him the Knuth of his field.
Ethylene is a part of a forward-feedback loop that causes fruit to ripen faster. That's why you put green tomatoes in a paper bag to ripen them - it concentrates the ethylene they outgas. It's also why "one bad apple spoils the bunch"
Apparently it "ripened" the ancients, too!