very very well Hive account@insight-out, I vividly remember your previous post

From the very beginning of his life, the older brother has always been taller, faster, smarter, and stronger.

I saw this in many families from my high school down to college. Is there a reason or science to this?

I see a serious point in Toman's conclusions. Especially in the sister-brother relationship, because I have seen that happen over and over again.