Greek's Oracles Relied on Nature's Signs

"Priestess of Delphi," 1891, John Collier.

Oracles in ancient Greece relied greatly on natural phenomena ~ sounds, smells, the rustling of leaves ~ to glean information regarding the fate of individuals and nations alike. According to an article in the Greek journal, ekathimerini.com:

Unlike fortunetellers today … ancient soothsayers dealt less with making specific predictions about the future than offering assurances that particular decisions were correct or incorrect or that the gods looked favorably or unfavorably upon particular actions. Ancient augury took many forms, including the reading of flights of birds and the examination of sacrificial animals’ livers or other internal organs. Sometimes right and wrong, or favor and disfavor, were determined through the casting of lots -- like the rolling of dice today. Colored pebbles or animal bones (including pigs’ “knucklebones”) were commonly used in these divinations.  

More formal, highly ritualized prophetic practices also took place in or beside certain ancient Greek temples. Among the gods associated with oracles and prophesies were Apollo and Zeus, whose sanctuaries at Delphi and Dodona were well-known in Greek lands and elsewhere in the Mediterranean world for their priests’ and priestesses’ strange abilities to convey divine pronouncements.

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