system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In humans, what is the functional difference between wide, flat noses and narrow, pointed noses?

Or is there a difference?
gpt
The various shapes of noses appear to be tied to adaptations to climate.

The nose must properly heat and humidify the air that you breathe. In a cold climate, it's advantageous to have a narrower nose. That's so that when a person inhales, more air comes into contact with the mucosal surface of nose, which provides moisture. The narrow nose maximizes the surface area.