Complex sentence: Likewise a number of archeologists propose that Middle Paleolithic societies such as Neanderthal societies may also have practiced the earliest form of totemism or animal worship in addition to their (presumably religious) burial of the dead.
Split into simpler sentences: Likewise a number of archeologists propose that Middle Paleolithic societies such as Neanderthal societies may also have practiced the earliest form of totemism or animal worship. In addition to their (presumably religious) burial of the dead.