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Thread: Fuck yeah, Science!

  1. #361
    Scott "Rufio" Feather Junebug's Avatar
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    Quote Originally Posted by pourdeac View Post
    Plausible syntheses of all of the basic building blocks of life have pretty much been found under early earth conditions...so amino acids (proteins), sugars and nucleic acids (DNA/RNA), etc. A lot of them are turning up on comets and asteroids...and now outerspace demonstrating the chemistry is not just earthly.

    What we don't know very well is how that all came together....the chirality, the timing, what was the key functional peptide/protein, how did RNA/DNA start...that kind of thing. A lot of people believe there were probably other chemical systems in early life which transmitted information like DNA, prions being one possibility. The likely abundance of amino acids and the ease of synthesis points to functional peptides forming first so peptides may have been used to build complex systems as we know it, plus transmit information for replication.
    Given all the uncertainty, how can you possibly say that you have "no doubt" that we've hit upon the right hypothesis?

  2. #362
    Quote Originally Posted by Junebug View Post
    Given all the uncertainty, how can you possibly say that you have "no doubt" that we've hit upon the right hypothesis?
    LOL...bugs you that bad does it?

    Life either evolved from what was here, plopped/transferred here from somewhere else, or was created out of thin air. There's no evidence of spontaneous creation and even if life was plopped/transferred here from somewhere else, it likely originally evolved from the cosmic goo. That leaves life at some point evolving from what existed.

    We have shown that all of the elements existed. We have found that lots of simple organic compounds existed in ample amounts and the chemistry for how they appeared has been worked out. Complex molecules have been synthesized in early earth conditions (primordial/cosmic) and the chemistry for those have been pretty much worked out. So with all the chemistry worked out to reasonable and repeatable processes, it's really just a matter of the sequence of events of how we went from pure chemistry and that pool of complex molecules to whatever the first biological system was. If that occurs once, it will repeat over and over again and the transformation will likely evolve. Once biology occurs, as evolution shows, the biology and chemistry gets increasingly more complex..often incorporating newer chemical technology along the way.

    It comes down to that jump. Given the stunning complexity and amazing chemical transformations that comprise living systems...and how those systems change chemically....believing that a jump occurred from pure chemistry to what one would call a biological system isn't exactly much of a reach. And without any other real scientific explanation for life, it had to have happened.

    Maybe you have another explanation?

  3. #363
    Pretty cool paper looking at 7 residue peptides which act as catalytic subunits with Zn+2 to form esterases...in other words complexes which do chemistry compared to what would have naturally occurred. Short peptides like these forming in a sea of amino acids over a billion years is certain. If esterases formed then complexes that catalyze amide reactions and peptide synthesis had to have occurred promoting the synthesis of peptides. Likewise if these esterases formed, redox complexes likely also formed and that would be considered something "new" as far as the chemistry of the primordial goo and would have introduced new amino acids. All of that would have led to more complex peptides doing an increasing array of chemistry over time.

    http://www.nature.com/nchem/journal/...chem.1894.html

  4. #364
    These early circadian clocks solely based on protein chemistry and rates of phosphorylation are really cool IMO, and also a good example of how pure chemical systems may have evolved into something "systemic".

    http://www.ncbi.nlm.nih.gov/pubmed/18419297

  5. #365

  6. #366
    Heard a podcast on geoengineering. Tapping the Earth's mantle for heat could provide limitless energy. Speaker said the technology would render energy "too cheap (abundant) to harvest."

  7. #367
    Resident Astrophysicist
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    Quote Originally Posted by jhmd2000 View Post
    Heard a podcast on geoengineering. Tapping the Earth's mantle for heat could provide limitless energy. Speaker said the technology would render energy "too cheap (abundant) to harvest."
    Seems like that effort would be better spent on lining the moon with solar panels. Mind linking me to the podcast?

  8. #368
    Quote Originally Posted by TWDeac View Post
    Seems like that effort would be better spent on lining the moon with solar panels. Mind linking me to the podcast?

  9. #369
    Quote Originally Posted by TWDeac View Post
    Seems like that effort would be better spent on lining the moon with solar panels. Mind linking me to the podcast?
    Posting from phone. Will do. N.D.T. on Carolla

  10. #370

  11. #371
    Has Evolution Bred Reality Out of Us
    http://www.npr.org/sections/13.7/201...lity-out-of-us

    If this is true, where does this leave the scientific method and its observation based conclusions?

    How does this theory mesh with the 2D universe?

    Does science embrace the metaphysical, aka real universe? Implications for "mind altering" drugs?

    This is pretty trippy stuff. I am interested in your comments.

  12. #372
    This is science, right? Pretty cool, none the less.


  13. #373
    Scooter Banks

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    I guess this kind of belongs here, but could also be in a Fuck You, Science! thread.



    No, sir. No, thank you. That'll be all.

    (More here):

    http://gizmodo.com/this-deep-sea-fis...tte-1790323479

  14. #374
    There is an article in the Washington Post today (January11) about a new theory on how the moon was formed and why its composition is very similar to earth. In essence, a lot of little moons were formed and then they came together to form the current big one.

    First part of the theory sounds reasonable and plausible. The second part, that all the little "moonlets" came together to form the big one still needs some significant explanation. There is no obvious reason a group of little moons should all come together. Indeed, earth would be a rarity in having a bunch of little moons come together into one. Many planets, including little "ice dwarf" Pluto have multiple moons, not one big one.

    I think there needs to be more work on this one, but an interesting read.

    Link to the article:

    https://www.washingtonpost.com/news/...=.02d1d7fa0cd0

  15. #375
    What if the moon were made of barbecued ribs? Would you eat it then? I know I would!

  16. #376
    Smoosh can you take that fish picture down, that shit is giving me nightmares
    Draxx them sklounst

  17. #377

  18. #378

  19. #379
    This is "fuck yeah" worthy - 7 Earth like planets found orbiting one star, 3 in the habitable zone.

    http://nasa.tumblr.com/post/15757960...habitable-zone

  20. #380
    PM a mod to cement your internet status forever
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    Disney Research turns a whole room into a wireless charger
    https://www.google.com/amp/newatlas..../%3Famp%3Dtrue

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