Complex sentence: No Neanderthal skeletal remain has ever been found to the south of Jerusalem, and although there are Middle Palaeolithic Levallois points in Jordan and in the Arabian peninsula, it is unclear whether these were made by Neanderthals or modern humans.
Split into simpler sentences: No Neanderthal skeletal remain has ever been found to the south of Jerusalem, but there are Middle Palaeolithic Levallois points in Jordan and in the Arabian peninsula. Yet is unclear whether these were made by Neanderthals or modern humans.