system
Given the following post, respond as if you're commenting on Reddit:
human
Why did land mass start out as one big clump (Pangea) rather than spread out right from the start?
gpt
It didn't start out that way, Pangea was just the last supercontinent that formed. The continents on the Earth roughly follow something called the supercontinent cycle, gradually changing from continents, to a supercontinent, back, and forth, over and over again. There were many supercontinents before Pangea, and there will be conceivably more in the future.