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bio website jfein.net
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visits member for 1 year, 9 months
seen Jul 14 at 16:57

web designer and developer.


Sep
24
awarded  Autobiographer
Jan
12
comment Does difference in expected life duration between men and women have biological nature?
Accept some answers please.
Jan
12
comment Photosynthesis - Light Intensity
Could you list a few ways that you've tried to research this question before asking here so we know that you've put effort into the question?
Jan
4
awarded  Supporter
Jan
2
comment How much gas is exchanged in one human breath?
Just as a side note, it's a common error to believe that you're just breathing out CO2 and H2O. You're also breathing out a fair amount of oxygen as well.