The Nibiru theory is truly fascinating given where it originated from. I mean, fuck, we're talking about an ancient culture who had no reason at all to jot down the things they wrote which, coincidentally, are nearly identical to all modern religions. Don't believe me? Watch this:
Sumerian: When in the height heaven was not named, And the earth beneath did not yet bear a name, And the primeval Apsu, who begat them, And chaos, Tiamut, the mother of them both. Their waters were mingled together, And no field was formed, no marsh was to be seen; When of the gods none had been called into being, And none bore a name, and no destinies were ordained; Then were created the gods in the midst of heaven, Lahmu and Lahamu were called into being.
Bible: Genesis 2-6: Now no shrub of the field had yet appeared on the earth, nor had any plant of the field sprouted; for the LORD God had not yet sent rain upon the earth, and there was no man to cultivate the ground. But springs welled up from the earth and watered the whole surface of the ground. Then the LORD God formed man from the dust of the ground and breathed the breath of life into his nostrils, and the man became a living being.