I suppose different things work out for different people. For me a day in Genesis is 1,000 years and it all works out just fine with what we currently know from science. But just because it all works for me does not mean it is going to work for you. We all have to discover truth for ourselves.
For me all the work they have done on the J1 and J2 Haplotype works out just fine with what is known in the Bible. So for me all of Genesis is true and it is can all be verified by Science as true. I know Science is very limited in what they can do. But as much as they are able, then science does indeed verify the Bible as being true.
If you look our understanding of Science or our understanding of the Bible 500 years ago, we have clearly come a long way in both areas. Just as the Bible says, as we get close to the end of this age or era, then knowledge and understanding will increase.
If the days of creation were 1,000 years long then the earth would be roughly 13,000 years old instead of 6,000, which isn't much of an improvement. For the Bible to agree with science, each day would have to equal about 642,000,000 years.
Also, the Bible says that the animals came about in the following order: Fish, birds, land animals, then humans. Well..actually that depends on which chapter of Genesis you read. The order is different in chapter two. The point is, this does not agree with science. Sure, scientists believe that life originated in the oceans (though there were plenty of creatures before the ones that swim) but birds did not come before land animals.
That's like claiming that the Enuma Elish agrees with science because it says that Marduk made Babylon and Babylon is the oldest city known to man. Well first of all, no it's not so your premise would be wrong, but even if it wasn't, that wouldn't prove the supernatural stuff like the giant cosmic dragon, Tiamat, or that Marduk is the god of storms.
See what I'm getting at? Not only does the story of Genesis not agree with science, but even if it did, that wouldn't prove anything supernatural.
Now, you're free to choose what you believe, but don't pretend that the two, science and the Bible, agree with each other.