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Many theologians have attempted to compute the date of creation by working back from this or a similar known date, through the various time intervals mentioned in the Bible.
For example: Work backwards through the Book of Judges.
Most current estimates based on a literal interpretation of the Bible, and in particular the belief that the Hebrew word "yom" in Genesis refers to a 24 hour day, cluster around 6,000 years ± 2,000 years for both the age of the Earth and of the rest of the universe.
These estimates are promoted by young-Earth creationists, and by the vast majority of Christian para-church organizations that specialize in origins.
However, in 1738, De Vignoles stated that he had found no fewer than 200 estimates of the date of creation, all based upon various diverse interpretations of the Bible.
Belief in a "young Earth" continued among scientists, until the early 18th century, when it became obvious to most researchers that geological processes were exceedingly slow, and must have been accomplished over incredibly long periods of time. A hundred years later, investigators studying Egyptian found that "Most scientific estimates of the Earth's age, based on actual measurements and calculations, are clustered around 4.5 billion years.
It is generally believed to have occurred about 1020 BCE, at a time when Egypt and Assyria were weakened and the Israelites were able to assert domination over their own territory.Scientists further believe that the earth's crust solidified about 3.9 billion years ago.Parts of the universe itself are much older, dating back to the big bang, some 13.7 billion years ago.Modern theologians believe that the "Judges" did not rule over all of Israel in a regular sequence.Instead, each Judge controlled separate tribe(s), so that their interval of rule overlapped.
Such estimates are accepted by most old Earth creationists, by essentially all geologists, biologists and other earth and life scientists, and by a small number of conservative Protestant para-church groups, like "Reasons to Believe." Back in 1991, scientists made many rough estimates of the age of the universe, ranging from 7 to 20 billion years.