Complex sentence: The actual significance of these symbols in the prehistoric period is not known, but from their ubiquity and apparent importance the symbols have been adopted in various schools of Neopaganism, esotericism and occultism.
Split into simpler sentences: The actual significance of these symbols in the prehistoric period is not known. From their ubiquity and apparent importance, however, the symbols have been adopted in various schools of Neopaganism, esotericism and occultism.