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Cake day: February 26th, 2024

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  • Solé’s fantastic and extremely recommendable book “Phase Transitions” covers this as well. Quoting Janssen et al.: “even when the group is faced with negative results, members may not suggest abandoning an earlier course of action, since this might break the existing unanimity.”
    “More generally, the underlying problem here is why complex societies might fail to adapt […]. Even if there is some social perception of risk, short-term thinking often prevails when facing long-term vulnerabilities. Such undesirable behavior is often favored by a combination of incomplete understanding of the problem, together with the misleading view that all changes are reversible.”







  • Yeah, this one had me kind of excited. The atmospheres of Earth and Venus are, in fact, both quite aggressive, but Earth’s is very oxidative and somewhat acidic whereas for Venus, it’s the other way around. As a consequence, on Venus, stuff like carbohydrates would break down easily, especially in that kind of temperatures. As a consequence, life would have to be very different from Earth’s, and any search would have to account for that.
    As for how phosphine could be created on Venus, maybe something like this: 4 H2O + 4 SO2 + H3PO4 → PH3 + 4 H2SO4, which is likely endothermic. So there would have to be a very specific advantage for a life form to bother creating it.










  • PrimeMinisterKeyes@lemmy.worldtoScience Memes@mander.xyzSoup
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    5 months ago

    Ever seen DMSO solidify upon cooling? I wouldn’t even call it vitrification, it obviously has macroscopically large crystalline domains. It would be like putting rocks in your veins. I mean it kind of works fine for single cells because the failures* can be treated as a statistic, but anything on the scale of organs will become damaged just too badly.

    * See e.g. what happens to frozen sperm cells: “chromatin disruption through protamine translocations, DNA fragmentation, and lesions to genes involved in fertilization capability and embryonic development […] are known consequences of the cryopreservation process.”


  • It can burn diamond at 720 °C, what do you think it’ll do to soft tissue over the course of an entire lifetime. Things helping aerobic life survive are
    a) partially consisting of partially oxidized polymers in the form of carbohydrates (remember, the only thing that cannot burn is what has already been burned);
    b) oxygen’s peculiar, natural triplet state which greatly slows down its kinetics compared e.g. to its horrible relative, ozone.