Beginning of life in earth

[MrMistery]

You mean, in the present? I can not think of anything but it probably is a way :lol

PS: since in my 12th grade textbook the origin of life is under evolution chapter i guess this topic belongs here better:

[victor]

But, in my textbook (indonesian version.. ) endosymbiotic theory is under "beginning of life" chapter..Anyway, let's consider it whether in evolution chapter or in the beginning of life chapter. Lynn Margulis is so great in giving her opinion about this matter..he2...thanks and thanks to all of you who reply my question.

[MMGW]

And maggots form spontaneously on rotting meat. Hey, just because we proved long ago that spontaneous generation is fallacious doesn't mean we can't resurrect it in a different form and call it a different name....
</sarcasm>

-Jelanen

What we proved was that life does not form spontaneously in short periods of time today. Extrapolating that to the argument that life could not form over millions of years on the early earth is, to say the least, an unjustified generalization.

1. On the early earth, condtions were very different than what we have on earth today. (High oxygen content in the atmosphere being one potentially relevant difference among **MANY**).

2. In the modern world, complex organic molecules tend to be consumed by previously existing organisms. So, living things may very well disturb the conditions needed for life to form.

[mith]

note the sarcasm

[b_d_41501]

Directed Panspermia all the way..............nah, not really . But I do buy into Panspermia theories. lol

[MrMistery]

Yes... But it is not something that happens today and you can observe it tomorrow. Cianophora paradoxa is an algae which does not have chloroplasts but has endosimbiotic cianobacteria. In a a milion years they will observe it's grandson and see that it has something resemblant to chloroplasts probably. But we can assist at some form of divergent evolution

[bioluva]

Hi guys! im new on the boards!
i was surfing the net, as i like to do on my saturday evenings, and i found this site! i was so excited!
I couldnt sign in for a while as my glasses were being repaired, by now im ready to discuss urey and miller, my latest fave theory, with you guys- my new best friends!
so what do you guys think about the hare krishna view of Urey/Miller?
Get back to me asap...ill be waiting!
luva ya
bioluva

[har0bed1813]

welcome! Glad there'll be someone more to put some intellegence in my life:P:P

[Tanya]

People here were talking about how life started: abiotically or "biotically": I there were times when this separation did not exist; if you look at the physics and chemistry of living structures, you will notice the redox mechanisms (i.e, oxidizing some compounds to get energy, and reducing another in order to create necessary (as a rule, more complex ones) for a living). THe difficulat part to explain is all the complexity of organic machinery (enzymes, and stuf like that) that underlies the redox reactions.
So, I guess at some point the transition from "abiotic " to "biotic" took place, like accumulation of quantitative characters turned into principally new qualitative feature. I think all we need is a new integrated theory of Life origin and understanding of information theory that exist right now.
Could you guys post some interesting weblinks about Life Origin?
Another comment about the panspermia theory. Very interesting indeed, but this only relocate the place of life origin to unknown location: if it did not began on Earth, than WHERE it began? I `d rather consider the Earth as a sutable place.
ALien flies:-) That is a funny one... but here is some data: the earliest life records found is 3.8 bilions years old, and the Earth is 4 bilions ears old itself. In these 0.2 bilions the Earth was lind of a mess (volcanimsm, extreme temperature gradient and so on.. from our today`s human perspective) . MAybe it was invitive for Alines? Who knows.
Anyway, I think it is more interesting trying to create life "in vitro" than just say, oh well, we will never know, how life originated. What you think?

[MrMistery]

Forum search. We have discussed the origin of life thingy. Plus http://www.chem.duke.edu/~jds/cruise_ch ... sites.html