Thank you, of troy for explanation.
Is the sentence I came up with really a run on sentence? I understand that what it wants to say is that humans can put more energy ( 'cost' ) into body self repair than mice because they have a lesser frequency and number in baby care.(and consequently can have a longer life span) This seems to be a single idea.

All I would like to know (hate to nag on) is: does the sentence I brought up read normal to you? Was I blind or am I stupid?

Thanks Maven, for your in the meantime answer. My grammar days are long gone and not in English.


Last edited by BranShea; 05/31/2007 5:21 PM.