[ExI] sex - was Re: The smart-stupid dimension

[John Clark]

On Sat, May 20, 2017 at 11:47 AM, SR Ballard <sen.otaku at gmail.com> wrote:

Mr.& Mrs. Darwin were first cousins and got married, though they had to
> jump through some hoops to do so.
>

​And in later life Darwin felt rather guilty about it after doing some
experiments with inbreeding in plants, he wrote to a friend "my children
are not very robust" and said "consanguineous marriages lead to deafness &
dumbness, blindness [etc.]". Of Darwin's 10 children 3 died before the age
of 10 and 3 more had no children despite long marriages.

On the other hand 3 of his sons grew up to become fellows of the Royal
Society.

John K Clark

>
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