Complex sentence: These primitive understandings gave way to more formalized inquiry around 3,500 to 3,000 B.C. in Mesopotamian and Ancient Egyptian cultures, which produced the first known written evidence of natural philosophy, the precursor of natural science.
Split into simpler sentences: These primitive understandings were augmented by more formalized inquiry around 3,500 to 3,000 B.C. in Mesopotamia and Ancient Egypt. These cultures produced the first known written evidence of natural philosophy, the precursor of natural science.