First the flood. Two independent methods—one scientific and the other biblical—will be used to calculate the date the flood began. Over the last 2,000 years, dozens of conflicting biblical chronologies have been proposed. Bible scholars and archaeologists frequently debate those differences. Although most biblical chronologies give dates for the flood that are reasonably close to the scientific conclusion, which will now be explained, only five biblical proposals lie within the ±100 year accuracy of the scientifically derived date.