"Antediluvian civilizations" are civilizations believed to have existed before the Great flood of Noah. If the fossil record is indeed the result of the Biblical flood as described in the Bible, then it is somewhat expected for evidence of antediluvian (pre-flood) civilizations to exist. It is assumed by many that humans reached advanced stages of technological development before the flood. Such presuppositions are usually based on the Biblical genealogy, which states that ancient people lived to approximately 10 times our current life span.
