Putting the life back in science fiction


Anne McCaffrey and Lynn Margulis, RIP
November 23, 2011, 8:40 pm
Filed under: fall, fantasy, Real Science Content, science fiction

Sad news today. Two grand ladies who had a strong influence on me have passed away. I can’t say that I knew them, although I heard both of them speak.

Anne McCaffrey died at her home in Ireland. She is, of course, known for her Pern novels, and I didn’t realize until I saw her obituary that The White Dragon was the first science fiction novel to make it onto the New York Times bestseller list.

Lynn Margulis, winner of the National Medal of Science, died at her home in Massachusetts. She’s best known for demonstrating that eukaryotic cells derived from serial endosymbiosis, the fusing of several prokaryotic cells to form the organelles of the eukaryote (and yes, I’m keeping it simple). I don’t think she was the first person to consider this idea, but she certainly was the one who demonstrated it and popularized the concept.

A copy of Dragonflight was the first book I ever had autographed, and I still have it. As a child in a house with a cat named Smaug, you can guess that I ran into dragons early, but I was drawing Michael Whelan-style dragons as soon as I saw the cover of The White Dragon in my parents’ hands. I’ve had a fondness for dragons ever since.

As for Dr. Margulis, she and I both went to the same school, albeit decades apart, and her books (particularly The First Four Billion Years, which I read for fun as an undergrad) introduced me to the concept of symbiosis, something which ultimately became the topic of my PhD research.

Oddly enough, the first book I wrote, Scion of the Zodiac, is in part about symbiosis, and in part about dragons. Thinking about it, perhaps I should have dedicated it to the two of them.

The world is a better place from their lives and their work, and they will be missed.

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The Interstellar Two-Step

Let’s assume, for the moment, that interstellar travel is possible. Let’s further assume that there’s no magic wand of teleportation or FTL, traveling to another star takes a looong time, and it basically means colonizing your starship (or gaiaspore, if starship is too passe for you). The ship may be Charlie Stross’s hollowed out asteroid, or a comet, or something similarly large, but whatever the ship looks like, the basic idea is that people don’t put their lives on hold for the duration of the trip. Rather, they settle into their ship, and then they (or their distant descendents) settle another world elsewhere.

The two-step is an environmental filter. Many technologies that are ubiquitous on Earth, such as cooking knives or internal combustion engines, are non-starters in free fall (where scissors work better) or in small biospheres (gasoline engines). Consequently, interstellar travelers will abandon quite a lot of Earth’s technology when they live in space. They’ll also certainly invent lots of uses for vacuum and all sorts of high energy particles, but that’s another story.

Anyway, once they’ve made the first step of abandoning Earth tech and its associated culture (no car culture in space), once they get to another planet, they’re faced with a new environment where they have to adapt again. Suddenly they have dependable gravity and a huge biosphere to draw on (or at least, a planet’s worth of resources). In the second step, do they simply adapt spacer culture and technology to meet the challenges of the new place, or do they read through copies of the ancient Wikipedia and start experimenting with, say, gasoline engines again?

There’s a real-life analogy to this process: Polynesia. As the Lapita peoples settled the Pacific, they abandoned things like pottery, weaving, and flaking rock (and possibly bronze metallurgy) as part of their adaptation to living on coral atolls. Once they colonized places like New Zealand, they didn’t spontaneously pick up their ancestor’s technologies, even though they had the resources (such as clay) to do them again. Instead, they adapted their Polynesian tool kits to new surroundings.

There are some subtleties here: for example, Polynesians didn’t just abandon pots because there was no clay on atolls. They were abandoning them before they got to the atolls, because they were switching from cooking over an open fire (where pots are useful) to cooking in an earth oven (where pots are useless). Moreover pots are more fragile than wooden bowls, coconut shells, and gourds. Similarly, they switched from flaking rock edges (on obsidian) to grinding, because grinding works on all sorts of materials, including the giant clam shells used for adze blades on atolls, while flaking just works on glassy rocks. The thing is, adzes work better when they’re ground rather than flaked (whatever they’re made of), the Polynesians also had bamboo (which can be shaped with an adze to make a nice sharp knife), and Easter Islanders figured out how to flake knives on their own in any case. The bottom line is that loss of technology isn’t just about losing the tech, its involves a whole shift to other tools and practices that sometimes makes things superfluous. A society on electric cars won’t be exactly the same as a society built around gasoline cars, because the two vehicles have different strengths and weaknesses.

Getting back to the interstellar two-step, it’s a fun to play as a thought game. If you were leaving Earth for space, what would you abandon? If you were planning on getting your descendents to settle elsewhere, would you have them do: resurrect Earth culture, adapt spacer culture, or both?

Examples of adapting spacer culture might range from using scissors and shears in place of knives, to using air guns instead of gunpowder, to using various cooking techniques that work regardless of gravity, but not gravity-requiring methods such as frying. How about transportation? Art? Agriculture? For example, if they kept goats in space, would you have them bring along cow embryos and the means to grow them to re-establish cattle, or would you rather give them the biotechnology to engineer a giant goat that fulfills most of the cow’s roles in terrestrial agriculture?

What do you think? How would you do the Interstellar Two-Step? I’ll say right off that there’s no right answer. This is a thought game, pure and simple.



Experimenting with Astrology
November 18, 2011, 4:34 am
Filed under: Real Science Content | Tags: ,

Just realized that I should have posted this for Halloween. So instead I suggest using this to start (or end) conversations on Thanksgiving.

Years ago, I came up with a way to objectively test astrology and personal horoscopes. It’s simple, and any experimenter can do it if he or she can find a bunch of willing participants and convince them to spend a few hours rating a bunch of horoscopes. I’ve described my results below, and I encourage other people to try it, as a psych experiment or just for fun.

Experimental Design:

Hypothesis: If astrology is useful, then a person’s horoscope should apply to them more than someone else’s horoscope does. Here, I’m not interested in any purported celestial mechanisms. If a horoscope works as advertised, then a personal horoscope should be more relevant to that person than someone else’s is (or a randomly created horoscope). If this is the case, then it’s worth looking for a mechanism. If the null hypothesis in the next paragraph is right, then there’s no point in looking for a mechanism, is there?

Null hypothesis: subjects will either rate all horoscopes approximately the same, and/or most subjects will find other people’s horoscopes more relevant to their lives than they do their own. I’ll explain why this might be the case lower down.

Method:
1. Find a website that gives out free, nine planet, twelve house horoscopes.
2. Recruit a bunch of experimental subjects. I’d suggest 10, and fewer than five is problematic. Get their birthplace, birth date and birth time information.
3. Compile everyone’s horoscope from the same website. The experimenter should strip out any identifying information (for example, anything that says Libra, Virgo, etc), and the subjects should not see their horoscopes prior to the experiment. Typically horoscopes are printed as a list of paragraph statements, one for each planet and house.
4. If you want, you can even add in randomly generated horoscopes.
5. If you want to make it simpler, you can do one more step. People who were born in the same year tend to have some of the same planets and houses (particularly for the outer planets, which move very slowly). To make it easier for the subjects, you can compile all the paragraphs into one long paper, and have everyone rate every paragraph once. You will have to create a key for which paragraph goes with which horoscope to compile the stats, but this saves on work for the subjects.
6. Have everyone rate EVERY horoscope, every paragraph, on whether that paragraph applies to them or not (I suggest: 1 pt if the paragraph is relevant to the subject’s life, 0 if it’s neutral, -1 if the paragraph does not apply to the subject’s life).

ANALYSIS:
7. Compile every person’s scoring of all horoscope paragraphs. Add up the scores per horoscope.
8. If astrology is true, the prediction is that each person should have scored their own horoscope higher than they scored those of the other participants. The stats for this are a bit more complicated than ranking individual scores, because just by chance, you would expect some people to pick their own horoscopes as the most applicable. Still, it’s not hard, and if the stats look too ugly, simply post how people rated their own and other horoscopes.
9. Collect post-test impressions from the subjects, distribute the results, and have fun talking about it.

When I ran this with 6 subjects with four additional random horoscopes, I got equivocal results (1 person picked their own horoscope, 5 people chose other people’s horoscopes, but with the small sample size, I couldn’t test the hypothesis). I’d love to see other people replicate the test and post their results.

The nice part about this is that it gets around all the tired ideological debates (“it’s not science” vs. “keep an open mind”) and looks at whether printed horoscopes have any perceived relevance to the people who requested them.

What I learned about horoscopes is that, when you read your own horoscope, you tend to focus on the bits that are relevant and ignore the rest. Horoscopes are written to favor this habit: they have a bunch of generally applicable advice mixed very nicely together, much like Forrest Gump’s box of chocolates. However, when you read other people’s horoscopes, what you find is that their horoscopes are also applicable to you. In fact, you may well like someone else’s horoscope better than you like your own. Five of the six people above found that, and one person even preferred a randomly generated horoscope over his own.

Most divination methods work this way: it’s not what is displayed by the cards, planets, coins, whatever, it’s what the person reads into them. This is not necessarily a bad thing, but I think it is better to understand how such a method works, rather than uncritically accept it.

Try it out, and tell me what you think.



Cool, Quiet, and Green: What does sustainability look like?

This one’s inspired by this NPR story, about sustainability.

What does sustainability look like? In The Ghosts of Deep Time, I have one character say that civilization is cool, quiet, and green, and that’s still my thumbnail for a sustainable city. To unpack that a bit:

Cool. Forests are cooler than grasslands, not because they get less sunshine, but because they catch more of that sunlight and do things with it. Scientists can actually determine how stressed a forest is by measuring how hot it is. Efficiency translates into less energy loss, which means less heating.

In cities, we tend to waste a lot of energy, which is why they are hot. Most of the sunshine gets reflected, or absorbed into surfaces that it heats up. Most of our equipment runs hot, which means we have to get rid of that heat too. A sustainable civilization doesn’t waste much energy, so it’s going to be cool.

Quiet goes with cool. Much of the noise of modern civilization is wasted energy, gone to making sound waves instead of useful work. An efficient civilization is going to be quiet as well as cool.

Green. This is both in philosophy and color. Plants can perform a large number of functions, from cleaning water to providing shade and cooling air. Moreover, we humans aren’t so far from our evolutionary roots that we don’ enjoy having plants around, even if our thumbs are scummy black rather than green. Obviously, a sustainable city will be ethically green as well, but from a simple design standpoint, I think it’s difficult to have a sustainable city without having a lot of functional plants around.

Anything else? Or can we do without one of these?