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      Welcome!   03/05/2016

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Don Edwards

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Posts posted by Don Edwards


  1. 33 minutes ago, Darth Fluffy said:

    It is generally true that many hybrids tend toward sterility, however it is not a rule. Weirdly, it is often true within a species, if geographic separation builds distinct populations. There are species which are fertile with neighbors, but individuals from long distances may not be fertile. together. 

    There are also several instances of "ring species." These happen when there's an obstacle to a species' spread that individuals can't cross, but can go around. Said obstacle being quite large, as compared to the distance individuals travel. So they spread around it in both directions, over multiple generations, with slight genetic drift... and when they finally meet again on the far side of the obstacle, the new neighbors can't interbreed. So variety A can cross with variety B, who can mate with variety C, and so on... but A and P, who are next-door neighbors, can't.

    (Another puzzle of "where and how do you draw a species line?". Along with the notion that each individual is the same species as their own mother, but if you go some number of generations back then maybe they aren't the same species....)

    33 minutes ago, Darth Fluffy said:

    Human populations seem to be able to interbreed with no problems, evidence that we are all close; but many of us carry other human DNA, such as Neanderthal, which says that some offspring were still fertile when they crossbred.

    There are some specimens from north-central Asia that carry the DNA of H.Sapiens Sapiens, H.Sapiens Neanderthalensis, H.Sapiens Denisova, and... um... those other H.Sapiens. Not Heidelbergensis. The ones we know absolutely nothing about except these odd traces of DNA in these specific specimens.


  2. 1 hour ago, Pharaoh RutinTutin said:

    Once we get it going, you will no longer need external direction for body functions like breathing. 

     

    Harold Groot said:

    It seems like only yesterday, perhaps at most the day before,
    a child watched a TV set and listened to the Redstones roar.
    I watched each second of that flight, and never did I think to leave.
    Fifteen minutes, not so long - except when you forget to breathe.


  3. 5 hours ago, Darth Fluffy said:

    I would tend to trust their numbers; they are close to the source, the guys that track results, and those guys have incentive to be accurate. 

    I amend that slightly. The guys that track results for the Ukrainian military have incentive to be accurate. The guys who tell the rest of the world the results, only have incentive to not be caught lying. (The easy way to achieve that, of course, is for them to also be accurate.)

    Those folks (their US equivalents) getting caught lying is a big part of why the US lost the Vietnam war. (Not the only big part. Back at the very beginning of that mess, the Pentagon's Plan A had been "stay the hell out of it." Johnson chose Plan C. Or maybe Plan F, considering that the terms of engagement he ordered prohibited the US military from acting like they actually intended to win.)

     


  4. Other instruments, you have your hands on. You can tell where they are in relation to the instrument, by feel - some combination of what your hands are touching and the positions of your wrists, elbows, and (for extreme cases such as the trombone and piano) shoulders.

    The theremin, you pretty much have to actually watch yourself play. An extra sense to incorporate.


  5. Genetically, Ashley looks like an Asian/European mix. Such appearances can be deceiving, though.

    Culturally she is definitely not Asian. Just look at her name, for starters. "Ashley" as a given name is extremely English - and relatively recent English at that, not getting going until after 1860. So her Asian genetics (if any) have apparently been passed through a few layers of culturally-Americanized ancestors.

    In my headcanon her last name is "Lysande", which is Swedish. (Not "Lysander" which apparently is somewhat-Anglicized Italian.)


  6. 12 hours ago, Darth Fluffy said:

    Everyone I know calls them seagulls, and your brother would get quizzical stares if he called them anything else, more correct or not.

    This.

    "Seagull" is a quite adequate name for the birds, for most people and purposes. Yes, there are more precise names for various species and varieties, but none more accurate.

    And why do some pedants get in a fuss over "seagull" but not over "jackrabbit" or "cottontail rabbit"? (Each of which actually covers multiple species of hare - not rabbits at all. While the "Belgian Hare" is a breed of domestic rabbit.) At least "seagulls" are in fact gulls.


  7. 1 hour ago, mlooney said:

    My brother, the bird watcher, would be all over you.  There is no such thing as a seagull.

    To the tune of a certain late-1960s cop show...

    Pedant.

    Pedant.

    Pedant, pedant, pedant.

    Pedant, pedaaaaaaaaant.

    Pedadadaant.


  8. Several years ago we had a lightning strike so close to use that we heard the hiss of the leader forming the path of the strike.

    Wouldn't mind if that doesn't happen again.


  9. 5 hours ago, mlooney said:

    Berry is a botanical term.  Vegetable is a culinary term.  They don't overlap.  They aren't meat, dairy, cereal or spice, that leaves vegetable.

    Vegetable is both a culinary term and a botanical term. Same for berry. And fruit. In each case, the meanings overlap, but are not identical, between the two contexts. (There's also the horticultural context. The meanings there tend to resemble those in the culinary context, but are not necessarily identical.)

    A jalapeño is a berry and a fruit, but don't put any in the fruit salad.

    A blackberry and a pineapple are both fruits but *not* berries. They are drupes. Each of the little balls that a blackberry is made of, and each scale of the pineapple (with what's behind it), is a berry. Go ahead and put some in the fruit salad (after appropriate preparation, particularly for the pineapple).

    An apple and a pumpkin are fruits and berries. They go in the fruit salad, but not in the mixed-berry compote.


  10. If your language genders nouns, be careful to use the correct gender.

    Spanish: Video el Papa = I saw the Pope. Video la Papa = I saw the potato.

    (Some years a go a T-shirt company in Central America made that mistake and sold some amusing novelty shirts.)


  11. And why haven't they invented a thermostat with two settings, one for heat and one for AC?

     

    (For that matter, why can't I find a portable space heater that, with a single setting, reliably WILL turn on the heat when the temperature in the room is in the low 60s and also reliably WON'T turn on the heat when it's in the upper 70s?)


  12. I think we'll have multiple definitions of "alive" depending on context. Just as we do for "fruit." Tomatoes, jalapeño peppers, gourds, olives, cucumbers are all fruits - according to botanists - but aren't normally included in fruit salads.

    So an AI in a mechanical body could be considered "alive" for a lot of purposes, but not in the context of being a patient at your local hospital's emergency room. (Possibly as part of the staff...)