this has nothing to do with trading, but i know there are some smart people who visit this site, so i figured i'd post this here.. first, i have to say, i don't really know too much about genetics. however, i have an interesting idea. i'm sure i'm not the first person to think of it, but i'll post it anyway. i totally believe in the future we will modify our dna. once we understand what all our genes do, i think it is only a matter of time before we are eliminating bad genes and eventually choosing our children's eye color. personally, i'm not against any of this. i'm not religious, so god is not a factor for me. i know many people will fundamentally disagree with this, but IT WILL HAPPEN..it may take generations to be accepted though. anyway, if you take my premise that we edit dna to choose our children's eye color, you may feel that since we are already alive, it is too late to change our dna. for example, say you find out you have some type of cancer gene. since you are already born, you might think there's nothing you can do about it...but you could filter that gene out for your children. today, i thought of this.. please remember i don't know too much about this stuff... anyway, i've heard that a virus, like aids, will take over a cell and modify the cell's dna to have it reproduce the aids virus. i think the same is for cancer cells. they go bad and reproduce. well here's my idea.... once you modified your dna how you want it, could you create some type of virus that would slowly go through your body and change over all your cells to the better version of your own dna? with my idea, even though you are already born, you could still benefit from genetic engineering. just to clarify, here's one more example. say you have brown eyes but you want blue eyes. you modify your dna and change the brown to blue. then you create a virus that has the new dna. you put it in your body and it takes over the old cells and replaces it with your new dna. maybe over time, your eye color could slowly change from brown to blue as old cells die and new cells are created with the modified dna. i know this may sound far fetched and i don't know much about this stuff, but i think my idea is at least interesting!