No, you can explain it without creationism.
I believe in creationism, but...hell, I copy-paste from my report here...it's complicated.
The average reader of the first 3 verses of Genesis will say that the world was nothing in the beginning and that God created it out of nothing. However, if one takes a closer look at the first three verses, I think that there is a better explanation. We cannot disrepute that God claims to be Alpha and Omega, and that Omega is an eternal future. Alpha, however, in mathematical terms, and in the context of the above phrase would mean eternal past. In this instance, why do we insist that the earth did not exist before the Genesis account? If God has an eternal past, then is it not possible that the planet earth existed before the account?
The Hebrew reads closer to “When God began to create the heavens and the earth, the earth was welter and waste (or chaos)…” These words suggest pre-existent earth. However, the word “was” in the Hebrew context does not mean “to be”, but “to become”. In this way, the verses should read as “When God began to create the heavens and the earth, the earth had become chaos…”
God is perfect, and intolerant of imperfection and sin. In this case, then God could not have made this chaotic earth, since it is obviously imperfect disorderly world. This begs to say that the world must have been created even before this chaotic earth, and that somehow something defiled it. Thus, John Hagee proposes that there has been an earth before the present planet that was chaotic and flooded (as is evidenced by verse 2), and that there was yet another earth before even the chaotic one that had become defiled.
The span of time between the original earth and the chaotic one is never described, and it is not stated that the original earth had been completely un-made and re-done in the Genesis account. Rather, God
seems to have flooded this original earth after its infection of chaos and imperfection, and destroyed all living things to begin again here in the Genesis account. In other words, this destruction and reformation would account for fossil structures, anomalies in the “evolutionary data”, and the apparent age of the earth.
But the question that arises is why and how. Why remake the earth, and how did it become infected to begin with? The Genesis account does not describe the fall of any being besides the Nephilim (who I will speak of later) from heaven, and yet there is a malicious lying creature in the Garden of Eden that tricks Eve into eating from the Tree of the Knowledge of Good and Evil. Mr. Hagee believes that this creature is Satan himself, who had fallen from heaven to the original earth. In other words, the defilement of the earth occurred when the father of lies descended upon it. The Book of Job describes the testing of the man Job by an angel, and many modern Bibles call that angel Satan, and from this, most readers deduce that this particular angel is also the fallen angel Lucifer, or the Devil. However, the words used in the Hebrew do not agree with this proposition, reading rather that the angel’s name is “Adversary” or ha’satan. The article heb, which is seen in the form ha here is never used preceding a proper noun, which would connotate a name. Rather, this angel “Adversary” is a true “Son of God” (the meaning of this name I will describe later) that serves as a tester (or lawyer) of men.
So, the earth was made originally perfect, Lucifer fell from heaven and destroyed the perfection, the earth was drowned out by God, and the Genesis account picks up after the fact. In this case, the seeming contradiction between geologic age and genealogical age is a moot point. The earth had been here before the Genesis account, which only describes the age of the new, renovated earth
In short, geologists may be correct in their calculations that the earth is millions of billions of years old, and the Bible is still infallible in its account starting from the renovations that are described in Genesis.
Evolution, on the other hand, is actually a theory that is destroyed by this hypothesis. If God had completely wiped out life on the planet and remade it in the Genesis account, then although there would be fossil records from the original earth, the animals and plants that were made in the Genesis account would not have had the time to “evolve” in the macro-context of the term. Thus, man is NOT by any means the descendant of simian ancestors, but an original creation of God. These hominid fossils that keep cropping up are not human or their predecessors, but creatures that existed in the original earth.