Complex sentence: The art of the Upper Palaeolithic is the oldest undisputed prehistoric art, originating in the Aurignacian archaeological period of Europe and the Levant some 40,000 years ago, and continues to the Mesolithic (at the beginnings of the Holocene) about 12,000 years ago.
Split into simpler sentences: The art of the Upper Palaeolithic is the oldest undisputed art (also known asprehistoric art). It originated in the Aurignacian archaeological period of Europe and the Levant some 40,000 years ago, and continued to the Mesolithic (at the beginnings of the Holocene) about 12,000 years ago.