system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why human babies take so long to learn how to walk compared to other animal babies.
gpt
Human babies take a long time to develop because they are born less mature than other animals. Why is this?

Humans have one major advantages over other animals: Advanced tool use. This requires a big brain and free hands to manipulate things. Walking upright gives us the hands free, and narrower hips help to walk upright. A big brain allows the smarts for understanding tools and complex visual processing.

But the brain needs to be protected inside a skull, and the skull needs to pass through the pelvis at birth. Now you have opposing demands: Narrow pelvis and big skulls! Everything is pushed to its limit in the competition of needs. The birth is painful and relatively dangerous, the skull isn't fully fused at birth so it can be squished, and humans are born relatively prematurely. It is OK though because humans can care for their offspring rather than requiring them to be able to run within hours like deer.