How did you get so smart?

[IIIIITHE1IIIII]

Aielyn said:

IIIIITHE1IIIII said:
Not solely. My brother had a much lighter body than me, yet he started walking later than me. That indicates a faster developing brain.

It's not the weight of the body, but the strength and coordination of the muscles. As in, actual physical capability of holding the body up.

And then there is the sense of balance. Also, doesn't the brain deal with the coordination of the muscles?