Showing posts with label natural selection. Show all posts
Showing posts with label natural selection. Show all posts

Saturday, 24 March 2012

My QED 2012 experience — part 1

For me the stand-out features of QED this year were the range of speakers and the socialising. Unlike last year I didn't stay at the conference hotel so I had to carry everything for the day with me — which turned out to be a raincoat and a fairly large camera bag. These, I'm happy to report, didn't impede me much.

Like last year I arrived on Friday, catching an earlier train than I'd expected from Euston, and took my time ambling from my lodging to the Mercure Piccadilly Hotel for a relaxed meal before the Mixer, which was scheduled for 8 but seemed to be in full swing some time before that. By 8, however, wandering through the packed bar area was like swimming through a sea of skeptic celebrities. It's not called the Mixer for nothing and is one of the things that makes QED special. Whether or not they had read Hayley Stevens' blog, many people seemed to be taking her advice about talking to 'strangers'.

As for the event itself, I shall blog about it in short bursts, with photographs:

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On Saturday, after Andy Wilson's official opening — not much more than a welcome and some housekeeping, Deborah Hyde kicked off with the historical context of the werewolf myth. Being the first speaker at an international conference can be, I imagine, a bit daunting, but Deborah displayed no sign of nerves even as her microphone was replaced or adjusted only seconds into her talk. Last year's first speaker was Bruce Hood, and I seem to remember he did take a few minutes (though not many) to get into his stride.

Deborah's talk was a new one, though she had given us a sneak preview at Portsmouth Skeptics in the Pub about a month earlier. In her QED talk she outlined the popular myths, and how it might have been reasonable, given the context and specific examples, to believe that werewolves were real. Bringing the myth down to earth, she included some real wolves.

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Next was Steve Jones, explaining what is meant by natural selection — immediately illustrating the diversity of speakers and topics at this year's QED: from an investigation into the historical basis of popular myths we had moved on to why evolution, as understood by Charles Darwin (though he never used the word in his Origin of Species), is an undirected process. The example Steve used was the generation of effective shapes for nozzles used in the industrial manufacture of powder, by applying random but small variations to successively more effective shapes, thus refining the efficiency and durability of the nozzles without knowing precisely why they work. It's apparently an engineering technique still in use today.

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The last speaker before lunch was David Aaronovitch. I was particularly keen to hear what he had to say as I attended the CFI Conspiracy Theories day at Conway Hall, at which David was scheduled to speak, but he had to withdraw due to ill health. So I was not entirely pleased when he began by announcing that his talk would be completely new and unike any of his previous talks. Nevertheless it was lively and off the cuff — conspiracy theories are everywhere so it's not as if there's a dearth of material — and well worth hearing. He spoke mostly about the conspiracy theory that's grown up around the affair of Dominique Strauss-Kahn — that the allegations against him of attempted rape are part of a sting organised by the French government (or more particularly by factions loyal to Nicolas Sarkozy).

After an equally lively Q&A session it was time for lunch. Topics had already ranged far and wide. More next time.

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(Click here for part 2.)


This is my 600th blogpost. I thought you'd like to know.

Sunday, 12 June 2011

Why don't anti-evolutionists understand evolution?

I sometimes wonder if certain Christians' objections to "Evilution" would be less if they understood even the basic idea of evolutionary theory. If someone goes to the trouble of producing a YouTube video claiming that evolution is a fairy tale because the theory claims that an animal evolved in a particular way for a particular reason, it's a good idea to know what evolutionary theory actually states.

http://youtu.be/p_Kgv_iJ8hA


In this video much scorn is poured on the reason given for the evolution of the giraffe's long neck. But anyone with even the slightest acquaintance with the process known as "Darwinian evolution by random mutation and natural selection" will be aware that the giraffe's neck did not get longer by stretching. So this video misses its target completely.

The video's producer is in need of some fairly basic education regarding evolutionary theory, and usually there's no shortage of commentary in that vein. But in this case comments are disabled. Why is that, I wonder?

Monday, 12 October 2009

The purpose of life

This post is sparked by an interesting recent episode of The Unbelievers, an engaging podcast out of New Zealand, in which the two hosts discussed (among other things) the idea of purpose, and how it colours the perception of both religious and non-religious people. While they agreed that atheism does not itself have a purpose, they nevertheless went on to speculate that the purpose of life could in some sense be "to reproduce". This, I feel, illustrates the strong grip that the idea of "intention" has on our human way of thinking, and it's not, in my opinion, helpful.

In the absence of a religious purpose for human life (for instance, "the glorification of God"), it might seem reasonable for perpetuation of the species to be offered as a substitute. But reproduction is simply what humans, and other species, do. If they didn't, they would become extinct. Reproduction is not, therefore, a purpose, but simply the result of evolution. Those that are best at reproduction (which includes being good at surviving to reproductive age) are the ones who pass on their genes to the most offspring.

Such a statement is somewhat tautologous ("the ones that survive are the ones that survive"), but its very tautology shows why the idea of a "purpose" behind it is wrong-headed. Human reproduction is the way it is as a result of random mutation and natural selection. There never was any over-arching intention or purpose behind it. Any instinctive impulse to reproduce is there because those without such an impulse tended not to reproduce.

But if there's no intrinsic purpose to life, why are we here? That, surely, is entirely up to us.