Complex sentence: Aristotle's successors Theophrastus and Strato continued the tradition of exploring philosophical and scientific theories, but after the middle of the 3rd century BCE, the school fell into a decline, and it was not until the Roman era that there was a revival.
Split into simpler sentences: Aristotle's successors Theophrastus and Strato continued the tradition of exploring philosophical and scientific theories. After the middle of the 3rd century BCE, the school fell into a decline, and it was not until the Roman era that there was a revival.