by Oolie » Sun Dec 14, 2008 3:58 am
I've been away from the site for a while but, yeah I did look it up Kevin. I don't know enough to argue it one way or the other comfortably but, at first glance, it does make some sense.
For those who haven't checked it out: the premise is that single celled organisms can 'absorb' nearby cells but instead of metabolizing them like they normally do for food, the absorbed cells continue their normal functions within the host cell. Basically a parasite whose presence isn't detrimental to the host and carries on its normal functions within the environment of the host cell. The examples I read about involved the theory that chloroplasts were originally algae that were 'absorbed' this way and continued to perform their primary functions within (but independent of) the host cell. Is that about right ?
Of course, my mind automatically goes to the mechanism or catalyst by which this first occurred, i.e. what inhibits the host cell from metabolizing the 'interloper' in the first place ?
Does the cell somehow recognize that there's more benefit in employing this new component to perform its normal functions in the service of the host, or is it just a freak occurrence that worked out beneficially and in so doing provided yet another example of natural selection at work ?
BTW, I should clarify something about my 'conciliatory' comment. I always question why people say things much more than what they're actually saying. Since I started hanging out here, I've learned that's a schizoid thing. Nothing personal.
Back to bugs in general though, I couldn't agree more that our paranoia has actually decreased our resistance and weakened us as a species. But then, everything fades and maybe this is what starts our decline. Without getting too personal, one of my favorite holidays is to head out into the bush and live paleolithically. I do take a backpack with food, clothing, etc but it gets cached unless I really need it. As a result, I drink local water and eat what I can find or hunt. It's mentally refreshing, keeps the rat-race in perspective and, most importantly I think it has a lot to do with why I rarely get so much as a sniffle.
When I went to Mexico a few years ago, the standard cautions about drinking the water were repeated to me ad nauseum, predominately by people who had never been anywhere. I have since learned (and practiced) that, by introducing oneself gradually to new water and food sources, most discomforts don't materialize. Obviously things like Giardia and Cryptospiridium aren't what I'm talking about, but the infamous Montezuma's Revenge wouldn't have been an issue before our ability to transport ourselves to a foreign environment almost instantly. If one had to take weeks or months to get to a new destination, one's system would be adjusted to the varying chemistry and different microorganisms found in the new environment. A four hour flight doesn't allow you to adjust to anything, especially not when your first exposure happens suddenly when the door of the aircraft is opened.
So, once again, we are weakened by our technology rather than enhanced by it.
From a social engineering aspect, I think it's part of the 'fear programming' that we're confronted with every day. I have CBC and BBC loaded as 'live bookmarks' in Firefox so, with the click of a toolbar button I can see a dozen or so of the most recent headlines. It seems that about two thirds of them describe something new to be afraid of. Of course, manufacturers are quick to offer a 'solution' that you can buy....ranging from antibacterial everything right up to Dubya coming out after 9/11 and saying "keep buying stuff"...
A cure for cancer won't be found until the research isn't so lucrative.
In that vein, I just started re-reading an old textbook about the Roman Empire up to 565AD. I always find it interesting to compare history to the present because the repetition of successes and mistakes fascinates me from an anthropological perspective, especially since I think we're due for a 'social earthquake'. But then, maybe that's just the peddlers of fear doing their thing - personally I don't really care much one way or the other but I'm certainly enjoying the show!