But such calculations in fact date from at least the Middle Ages, and offer a range of dates from around 5000 to 4000 BC. Judaic tradition (to which the Old Testament of course belongs) reckons the date of creation at 3760 BC. Another calculation, beginning with the date of the destruction of Jerusalem known from secular history and working backwards, arrives at 4163 BC. <ref> http://web.newsguy.com/rubyredinger/age.html Biblical age of the Earth</ref>
Based mainly on geological dating methods, however, secular scientific research generally dates the formation of the Earth to around 4.5 billion (4.5 * 10<sup>9</sup>) years ago, which is significantly more accurate than any of the guesstimates shown above.<ref>[http://pubs.usgs.gov/gip/geotime/age.html USGS, ''Geologic Time: Age of the Earth.''] Accessed April 18, 2007.</ref>
== Notes ==