I looked at the site & some other sites. I believe that the English translations of certain Hebrew words are inaccurate. Bishop Ussher was a good scholar, but he also had to use non biblical sources for his calculations to try to match the dates. I just hope people don't miss the message of the gospel by getting confused. Jesus is God, and the bible is the word of God, inerrant in the original meanings of the original languages. We just can't understand all of it clearly.