Archive for September, 2007

What makes an animal wild?

Friday, September 28th, 2007

When I was about 6, I was bitten pretty badly on the back of one leg by a neighbor’s German shepherd that saw me running around in circles and mistook me for fleeing prey. It had the effect of making me look at dogs differently than most people. In even the smallest dog I could see the teeth, the potential for rage, and I felt an inability to know what they were really thinking or feeling. Unlike humans, you couldn’t communicate easily with a dog, and I wondered at people’s willingness to raise the sharp toothed creatures and treat them like their children.

When I was perhaps 10, I lost my fear of dogs. I had a friend who was a few years older, who every kid on the street admired for his bravery, his athleticism, and his collection of martial arts weaponry. A bunch of us were in a large field when 2 doberman pinchers appeared at the far end of the field and started approaching us, snarling. My friend ran away from us, and away from the dogs, and they took chase after him. But then he turned and ran straight at them being noisy and flapping his arms, and they became confused, and ended up running from him. I realized then that dogs were vulnerable creatures, and easily manipulated by human intelligence. I started to see better how dogs have many states of mind, which vary between individuals. As you can see from my paintings of the terribly sweet Lara and the very inquisitive Tank, I have attempted through painting to capture the essence of some of the dogs I know. My fiancee and I recently rescued a beautiful puppy that’s a German shepherd mix of some type, named her Bizou, and she’s now part of our family. She gives us play bites sometimes, but they don’t hurt.

Yet some part of me remains aware that models for predicting behavior can be seriously flawed.

Sometimes our models are flawed because in making our models for animal behavior we are getting confused about the true causes. The dog is barking because its territory is being infringed, not because it doesn’t like someone.

Sometimes they are flawed because the models are only predictors of what usually happens, and don’t account for extreme situations. Like a polar bear deciding it wants to play with a husky (http://speakingoffaith.publicradio.org/programs/play/audiogallery/soundseen.shtml#slideshow).

And sometimes our models don’t accurately reflect what usually happens, because we are kept ignorant of behavior or choose to avoid observing true behavior. Like the vicious fighting engaged in by giraffes trying to establish dominance (http://www.youtube.com/watch?v=C7HCIGFdBt8).

With animals, when our models fail to make accurate predictions, we call it wildness. And yet perhaps unpredictability is more a fault of our ability to model, of our internal capabilities, than it is a characteristic of the animal. The animal is likely acting on a complex chain of cause and effect relationships, which we don’t understand, but that are still there. If that’s true, real wildness lies in ourselves.

Update, 9/28/07: Some animals, once trained, are more likely to hold to that conditioning than others, at least until a powerful environmental stimulus causes them to forget their conditioning. We consider such animals domesticable, and think of their character as reverting to one that is more wild. But in this use of the word “wild” we often mean behavior we would find predictable (e.g., the dog will chase a skunk), but tried to condition out of the animal. My conclusion is that wildness has two definitions: one is based on the unpredictability we feel about nature, and the other just means acting as they would in nature without human agency or conditioning even if we find such acts predictable. In this second sense, the dog isn’t really acting wild, it’s acting natural, as if “in the wild”.

A decline in violence

Sunday, September 23rd, 2007

If you feel instinctively that humanity has been getting more violent all the time, and you feel acutely that modern society is a horror as a result, you should watch Steven Pinker’s presentation at TED, where he provides evidence that human progress has led to diminishing violence over time.

http://www.ted.com/index.php/talks/view/id/163

Freeman Dyson’s opinions on climate change

Tuesday, September 18th, 2007

In my prior post on Michael Crichton, I wrote about how Mr. Crichton had taken the time to evaluate the computer models that have led so many people to have such strong concerns about a global warming crisis. Mr. Crichton found them lacking, particularly with respect to predicting doomsday scenarios. I stated that I haven’t looked at the models, but I admired him for taking the time to look at the evidence and coming to his own opinion.

My friend Michael Hartl, a Caltech PhD, is also a skeptic. He agrees global warming is factually true, but doesn’t find it convincing that it must be due to human activity or that the warming will likely lead to some type of doomsday. Here’s his post on the subject: http://eikonoklastes.org/articles/2007/09/05/global-warming

You can also add the famed physicist Freeman Dyson (wikipedia) to the list of global warming doomsday skeptics. He elaborates on his opinions about such warming to a great degree in an article in Edge issue 219 (http://www.edge.org/documents/archive/edge219.html#dysonf).

His basic points are:

  • Science sometimes can’t yet provide an answer; but the public will choose one anyway. Even when science lacks understanding, the public prefers to listen to confident answers and predictions by the consensus opinion of the most vocal scientists of the day. That is why heretics who question scientific dogmas have been and will continue to be useful in science, particularly on things that aren’t well understood.
  • Climate isn’t properly described by computer models; it’s described by data. Global climate is a very complicated thing, and the causes of warming or cooling are not well understood. Climate computer models solve the equations of fluid dynamics, and they do a very good job of describing the fluid motions of the atmosphere and the oceans. They do a very poor job of describing the clouds, the dust, the chemistry and the biology of fields and farms and forests, which appear to have a significant impact on climate. They therefore do not begin to describe the real world that we live in. Diseases must be diagnosed before they can be cured. We need to observe and measure what is going on in the biosphere, rather than relying on such computer models.
  • Warming is local. It’s true parts of the Earth are getting warmer, but the warming is not global. The warming effect of carbon dioxide is strongest where air is cold and dry, mainly in the arctic rather than in the tropics, mainly in mountainous regions rather than in lowlands, mainly in winter rather than in summer, and mainly at night rather than in daytime. The warming is real, but it is mostly making cold places warmer rather than making hot places hotter. To represent this local warming by a global average is misleading.
  • Technology to fix things improves over time. If biotechnology takes over the planet in the next fifty years, as computer technology has taken it over in the last fifty years, the rules of the climate game will be radically changed. To stop the carbon in the atmosphere from increasing, we only need to grow the biomass in the soil by a hundredth of an inch per year. … the problem of carbon dioxide in the atmosphere is a problem of land management.
  • Sea level is rising, but not necessarily because of humanity’s actions. We have accurate measurements of sea level going back two hundred years. We observe a steady rise from 1800 to the present, with an acceleration during the last fifty years. It is widely believed that the recent acceleration is due to human activities, since it coincides in time with the rapid increase of carbon dioxide in the atmosphere. But the rise from 1800 to 1900 was probably not due to human activities. The scale of industrial activities in the nineteenth century was not large enough to have had measurable global effects. So a large part of the observed rise in sea level must have other causes. One possible cause is a slow readjustment of the shape of the earth to the disappearance of the northern ice-sheets at the end of the ice age twelve thousand years ago. Another possible cause is the large-scale melting of glaciers, which also began long before human influences on climate became significant.
  • The threat of an Ice Age is still very real, and it’s not clear how warming effects this threat. For the last 800,000 years every 100,000 there is an ice age lasting 90,000 years and a warm interglacial period lasting 10,000 years. We are at present in a warm period that began 12,000 years ago. We do not know if human activities in general, and burning of fossil fuels in particular, make the onset of the next ice-age more likely or less likely.
  • A warmer world has existed before, and could have benefits. Roughly 6,000 years ago, there were deciduous forests in Northern Europe where the trees are now conifers, proving that the climate in the far north was milder than it is today. There were also trees standing in mountain valleys in Switzerland that are now filled with famous glaciers. 6,000 years ago seems to have been the warmest and wettest period of the interglacial era that began 12,000 years ago when the last Ice Age ended. If the increase of carbon dioxide in the atmosphere is allowed to continue, shall we arrive at a climate similar to the climate of 6,000 years ago when the Sahara was wet? Second, if we could choose between the climate of today with a dry Sahara and the climate of 6,000 years ago with a wet Sahara, should we prefer the climate of today?
  • Two different types of values. The science of planetary ecology is still young and undeveloped. It is not surprising that honest and well-informed experts can disagree about facts. But beyond the disagreement about facts, there is another deeper disagreement about values. The disagreement about values may be described in an over-simplified way as a disagreement between naturalists and humanists. Naturalists believe that nature knows best. For them the highest value is to respect the natural order of things. Any gross human disruption of the natural environment is evil. Excessive burning of fossil fuels is evil. Changing nature’s desert, either the Sahara desert or the ocean desert, into a managed ecosystem where giraffes or tunafish may flourish, is likewise evil. The humanist ethic begins with the belief that humans are an essential part of nature. Humans have the right and the duty to reconstruct nature so that humans and biosphere can both survive and prosper. For humanists, the highest value is harmonious coexistence between humans and nature. The greatest evils are poverty, underdevelopment, unemployment, disease and hunger, all the conditions that deprive people of opportunities and limit their freedoms.

Definitely more food for thought.