Our Earth is millions of years old. The bible tells us and science proves it.

Genesis:1:1-2
1. In the beginning God created the heaven and the earth.
2. And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
  
         In verse 2, the word "was" in the Hebrew is "tohu va bohu", which means and should have been so translated ''became". The only possible deduction from this is that God destroyed the world that was.

2 Peter 3:4-7
5. For this they willingly are ignorant of, that by the word of God the heavens were of old, and the earth standing out of the water and in the water:
6. Whereby the world that then was, being overflowed with water, perished:
7. But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.

   (2 Peter 3:5-7) The error of scoffers.

     For this they willfully forget: The scoffers presume upon the mercy and longsuffering of God, insisting that because they have never seen a widespread judgment of God, that there will never be one. But they willfully forget God’s creation and the judgment God poured out on the earth in the days of Noah.

        #1. A literal belief in Creation, in Adam and Eve, and in Noah’s Flood are essential for a true understanding of God’s working both then and now. To deny these things undermines the very foundations of our faith. Sadly, today it is many Christians who willfully forget these things, putting themselves in the place of scoffers.

       That by the word of God the heavens were of old: The Bible clearly teaches that the active agent in creation was God’s word - He spoke, and creation came into being.

     #2. The world that then existed perished, being flooded with water: Peter’s point is that things on this earth have not always continued the way the are now. The earth was different when God first created it, then it was different again after the flood. Therefore no one should scoff at God’s promise that He will make it different again, judging it not with water, but with fire. The same word that created all matter, and judged the world in the flood will one day bring a judgment of fire upon the earth.
        
          Dinosaurs in the bible?...

       Let's go to Job Ch.40 and see what God tells Job about the dinosaur.

Job 40:15
Behold now behemoth, which I made with thee (Job); he eateth grass as an ox.

          "behemoth" - the Strong's Concordance H930 - bĕhemowth - an extinct dinosaur a Diplodocus or Brachiosaurus
      
"I made with thee" -  Don't look over this because our Father is telling Job, I made the Dinosaur and you were there Job, and the Dinosaur was in the first earth age as we went over.

Job 40:16
Lo now, his strength is in his loins, and his force is in the navel of his belly.
His massive strength is in his loins: his force doth in his belly's muscles lie.

Job 40:17
He moveth his tail like a cedar: the sinews are of his stones (sinews from his thighs are firm) are wrapped (and entwined) together.

   cedar - A cedar tree is very tall and God says his tail moves like one. Wow! that's a long tail.

Job 40:18
His bones are as strong pieces of brass; his bones are like bars of iron.
Job 40:19
He is the chief (first, beginning) of the ways of God: he that made him (fashion, accomplish, make) can make his sword to approach (to draw near, approach) unto him.

       God created the Dinosaurs and God can approach the Dinosaurs if He wants and that is what God is saying to Job.

       So Job, and all people in the World who was ever born, and all that will be born were in the first Earth age in our spiritual body, in a different dimension along with Job.  And when we die we return to our spiritual body in Heaven as God created everyone that ever lived, born, and passed away as God says next in Eccl 12 and Mark 9.

Eccl.12:7
Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.

Mark9:2
And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into an high mountain apart by themselves: and he was transfigured (appeared from another dimension of spiritual bodies before them).

Mark9:3 And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them.

Mark9:4
And there appeared unto them Elias ( Elijah) with Moses: and they were talking with Jesus.

       Moses and Elijah came to this dimension from their spiritual bodies dimension and Jesus was transformed to His spiritual body all of which were in this flesh age but not in flesh bodies and Peter, and James, and John all saw them together.

        I pray that this has been as enlightening for you to read as it was for me, and to bring it to you in this message.
                     God bless.