system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why do baby teeth grow in straight, but adult teeth grow in crooked?
gpt
Permanent/adult teeth are a lot larger than baby teeth so they take up more room. If the size of the mouth lags behind the development of the adult teeth, then they will come in crooked or even like a shark tooth where the adult tooth doesn't actually crush the baby tooth's root and comes in front of it or behind it.