system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do people and animals tilt their heads when they are curious?
gpt
This is a cool one!

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Our ears, just like for all animals, are on equal height on the sides of our heads.

Tilting our heads makes the sounds hit our ears at a slightly different moment, without turning our heads, which would reduce our sight.

This helps with estimating from how far away the sound is coming while still keeping an eye out.

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Humans being social group animals, learned quickly to recognise this behavior as "paying attention"

So we also started doing it in conversations as a signal that we are paying attention.