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    • CommentAuthorAsterix
    • CommentTimeDec 5th 2021
     
    Angus, why is "Here" underlined and highlighted in your post--it's not a URL tag.
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      CommentAuthorAngus
    • CommentTimeDec 5th 2021
     
    Ooops. Typed "-" instead of "="
    • CommentAuthorAsterix
    • CommentTimeDec 6th 2021 edited
     
    Since mass is a key component of this, why not vaporize liquid mercury? Much more massive than iodine. Boils at about twice the temperature, but that shouldn't be an issue.

    Ah, ferget it--Hg is only slightly more dense than I, and not worth the extra heat.
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      CommentAuthorAngus
    • CommentTimeDec 6th 2021 edited
     
    I imagine the vapour pressure is too low. And there must be an advantage to sublimation rather than dealing with a liquid. Would you need an ullage motor to get your ion thruster going?
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    A eutectic mixture of hafnium, selenium, dysprosium and praseodymium might be even better
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      CommentAuthorAngus
    • CommentTimeDec 6th 2021
     
    And ultra cheap as well!
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      CommentAuthorTrim
    • CommentTimeDec 7th 2021
     
    Is the origin of Oumuamua solved? Harvard astrophysicists say, no - YouTube

    https://m.youtube.com/watch?v=Oi0i9iJP4Zw
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      CommentAuthorAngus
    • CommentTimeDec 7th 2021
     
    Well, that unsettles it, then.
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      CommentAuthorTrim
    • CommentTimeDec 7th 2021
     
    Should have reacted earlier and sent a probe after it.

    Dentists have enough.
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      CommentAuthorTrim
    • CommentTimeDec 26th 2021
     
    Lets hope all goes well.

    NASA’s DART Spacecraft Opens Its “Eye” and Returns First Images From Space.

    https://scitechdaily.com/nasas-dart-spacecraft-opens-its-eye-and-returns-first-images-from-space/
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      CommentAuthorTrim
    • CommentTimeDec 27th 2021
     
    How NASA’s Psyche Mission Will Explore an Unknown World We Can Barely Pinpoint From Earth.

    https://scitechdaily.com/how-nasas-psyche-mission-will-explore-an-unknown-world-we-can-barely-pinpoint-from-earth/


    Should be worth some dosh.
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      CommentAuthorTrim
    • CommentTimeDec 28th 2021
     
    The Discovery No-one Expected Found in Stardust - YouTube

    https://m.youtube.com/watch?v=q_QXafM3Sk0
  3.  
    The Asteroid Winter - JMG
    https://www.youtube.com/watch?v=HynoYHDC11w

    The earliest crow family fossils date back at least 15 million years and represent the best candidates for an evolving intelligent dinosaur civilisation. And yet they have not become that despite the deep time involved. Clearly there's much about the evolution of civilisation that we have yet to understand.
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      CommentAuthorAngus
    • CommentTimeFeb 12th 2022
     
    Crow behaviour around here is most uncivilised. But very intelligent. And the ravens are worse.
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      CommentAuthorDuracell
    • CommentTimeFeb 12th 2022 edited
     
    A lot of crows and ravens nest close to where I live. Very intelligent and playful birds. They remind me of cats, except that they seem to me to be somewhat less intentionally cruel. I have observed crows feeding on the eyeballs of living mammals, but that seems to me to be more about easy pickings than it is about intentional cruelty. I like cats, but they seem to me to gleefully revel and delight in their own malevolence. I understand the argument put forth about how cats torture mice being for the purpose of educating their kittens, but I don’t fully buy it because they just seem to me to be enjoying themselves far too much. I have observed crows caring for, feeding and defending injured and older birds that would not otherwise survive without the support and charity of their flock.
    • CommentAuthorAsterix
    • CommentTimeFeb 12th 2022 edited
     
    Like my black labrador and squirrels. If she catches one (and she's very fast), she'll kill it, but there appears to be no interest in eating it. Fortunately, the squirrels are pretty darned fecund, so no shortage.
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      CommentAuthorAngus
    • CommentTimeFeb 12th 2022
     
    Posted By: Duracelldelight in their own malevolence


    Orcas are smarter than cats and crueller.
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      CommentAuthorDuracell
    • CommentTimeFeb 12th 2022
     
    Posted By: Angus
    Posted By: Duracelldelight in their own malevolence


    Orcas are smarter than cats and crueller.
    For sure, and dolphins always seem to me to be the assholes of the sea.
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      CommentAuthorAngus
    • CommentTimeFeb 12th 2022
     
    Really? I thought everybody loved the smiley face of Tursiops. An Orca is just a big dolphin, anyway.