Complex sentence: Polywater was a form of water which appeared to have a much higher boiling point and much lower freezing point than normal water; many articles were published on the subject, and research on polywater was done around the world with mixed results.
Split into simpler sentences: Polywater was a form of water which appeared to have a much higher boiling point and much lower freezing point than normal water. Many articles were published on the subject, and research on polywater was done around the world with mixed results.