“On the seventh day he rested from all his work.” (Gen 2:2, NIV). God’s rest on the seventh day carries great theological significance (e.g. establishing the Sabbath), but it also helps clarify the nature of the creation days. The author of Genesis closes each of the first six days with an "evening and morning" but not the seventh day. Passages such as Psalm 95 and Hebrews 4 declare that we all have an opportunity to enter God’s rest, implying that the seventh day extends to the present time. Long creation days integrate well with evidence from creation. During the first six days of creation, as Psalm 104 explains, God created animals, caused them to go extinct and then created new animals. On the seventh day God ceased His creation of new animals, and today, the day of rest, we see evidence only of variation and extinction.