Younger brothers are biologically disadvantaged!

Per Se · Dec 27, 2008

Vanihm said: ↑

I thought this was interesting when it comes to boxing:
A study of finnish birth records for over 100 years shows that firstborn sons were always (on average) bigger, more successful and produced more offspring than their younger brothers. The reason has something to do with the testosterone levels in the mother.

But, knowing this, can anyone name famous brothers in boxing where the younger brother was more successful?

I can think of Michael Spinks, though he was actually physically smaller than his brother (or at least lighter).

Zab Judah's brothers are freak cases as well. Do they have the same mother?
Click to expand...

Miguel Cotto is bigger/stronger/better than his elder brother Jose Miguel Cotto.

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Younger brothers are biologically disadvantaged!

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Younger brothers are biologically disadvantaged!

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