Well, if you listen God in the Old testament, all universe and our planet was created in 6 days!
If you ask Jews, earth is about 6 000 years old.
If you ask scientists, earth is about 4 billion years old.
So, what is truth?
In my opinion we should more believe in science than religion.
I'm also believer but I don't think that we should accept and believe everything in the Bible literally.
If God said he created everything in 6 days, it can means 6 periods or ages, what is in accordance with science.
After all, in other place in the bible it's said that in the eyes of god one day is like thousand years and thousand years is like one day.
If God says that He is talking figuratively, then understand it as figurative language.
If God doesn't say that He is talking figuratively, then believe what He says. If you don't, you are making Him out to be a liar. That is something like the first sin was about. Eve believed the devil rather than God.
If you don't believe all of the Bible, why would you believe any of it? You can't just pick and choose what parts of it to believe. Why not? The whole Bible is a unit at the same time it is many separate writings. It is a unit that tells about Jesus and the salvation He provides.
When God says that one day is like a thousand years, and a thousand years like a day, which one is it? God isn't talking literally about days and years in this place (in Peter). Rather, He is showing that He is showing us that we can not fathom how God understands things, and that He is different in the way that He understands things than we are, and that He views all things way more thoroughly than we do, and that He is way beyond us.
Science is guesswork. Most of us have not lived much longer than 4,500 years. So, we don't know what happened back then for sure. Even the scientists will tell you by the language that they use in their papers that they do not know for sure. The Bible is what God told His prophets to write. Will we call God a liar like Eve essentially did?