1057 AM [Chart]
3167 BC [Chart]
Genesis 6 - 9
Noah, his sons and their wives are uniquely situated in the history of the Earth. These people are the only people to have experienced the Earth before and after the Flood. They would be able to compare first-hand what the environment was like before and after the Flood. For example, one thing that seems clear from the biblical narrative is that prior to the Flood it had never rained. In today's environment rain is an essential element in the weather cycle. This one factor is an indication of the difference in the ecology of pre-Flood Earth.
See The Flood for a detailed description of the events surrounding the Flood and Noah's involvement in it.