The hymns on Creation from the Rig Veda narrates that right at the beginning of the creation there was neither existence, non-entity, no world, no sky, no death, no immortality and no day or night. The Creator breathed on His own impulse. Other than Him nothing existed upon this earth. There was darkness too but the entire universe was engulfed in it. All that existed was the formless. But what led to the formation of a 'Unit' was the desire to create life force.
The unique feature about these hymns is that they question the very existence of the Creator. According to these the gods came afterwards, with the creation of this universe. In fact when this creation took place or who created it; whether it was created on its own; such questions can only be answered either by the Almighty or perhaps even He does not know.
The theory of Creation discussed in the Rig Veda is partly similar to that explained in Christianity. However its questioning the Creator's existence or his contribution in shaping the universe puts Rig Veda apart from that of Christian theories.