In article ,
Tim Tyler wrote:
snip

: TBH there will have been no pressure to make us more able to cope
: withthese toxins, unless they had been potent enough to kill off
: individuals before they breed.

Not entirely accurate - since there's non-fatal damage which reduces
fertility before breeding - and parental care - to consider.
Indeed POP's came into that category.

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Regards from Robert Seago : http://www.users.zetnet.co.uk/rjseago