You really must have headphones on when you listen to this wonderful exercise in stereophony.
There’s more information on how it was made at toomanytribbles. You’ve gotta love your brain and the way it can translate phase and timing differences in sound into a spatial map, without you really having to think about it.
The giant squid and I have so much in common.
We made it safe and sound to Sea-Tac late last night, and bright and early this morning we made a quick trip to the local grocery store to stock up on breakfast supplies, and we discovered that we really are in Seattle.
The grocery carts had cup-holders.
And of course there was a Starbucks inside the grocery store.
Peggy has an excellent discusion of the peculiar attitudes towards biology held by physicists and engineers, which includes this wonderful complaint by Jack Cohen:
In summer 2002, I was at the Cheltenham Festival of Science. Lots of biologists presenting, for sure. But… one very popular event was a presentation by three famous astronomers: ‘Is There Life Out There?’ I prefaced my first question to them by a little imaginative scenario: three biologists discussing the properties of the black hole in the middle of our galaxy. It was very clear that the astronomers really believed that they could discuss ‘life’ professionally, whereas everyone saw biologists talking about black holes as absurd.
Oh, and let’s get started on how SF treats biology…
Yes, I am away for this week — I’m off wearing flannel, listening to grunge, and drinking coffee as I chop down trees in the rain (did I miss any stereotypes?). Updates to Pharyngula will still happen, though, so don’t abandon me completely. They will be more sporadic, but when they do happen, they will be pungent with the tang of Puget Sound, soaring like the majestic Cascades, and as affectionate and cuddly as the banana slug. Or not. Check below to see if anything new trickles in.
And if the content sucks, tough. I’m having fun!
I have to go catch a plane to Seattle, so I’ll leave you all with a little exercise. This random bit of creationist email just sailed in over the transom—it’s simple and to the point, and isn’t even afflicted with the usual random font stylings I get. It’s still just as kooky in its substance, though. Can you spot the logical error? Can you explain it plainly and simply?
What properties should we expect from an evolved system rather than a designed one? Complexity is one, another is surprises. We should see features that baffle us and that don’t make sense from a simply functional and logical standpoint.
That’s also exactly what we see in systems designed by processes of artificial evolution. Adrian Thompson used randomized binary data on Field-Programmable Gate Arrays, followed by selection for FPGAs that could recognize tones input into them. After several thousand generations, he had FPGAs that would discriminate between two tones, or respond to the words “stop” and “go”, by producing 0 or 5 volts. Then came the fun part: trying to figure out how the best performing chip worked:
Dr. Thompson peered inside his perfect offspring to gain insight into its methods, but what he found inside was baffling. The plucky chip was utilizing only thirty-seven of its one hundred logic gates, and most of them were arranged in a curious collection of feedback loops. Five individual logic cells were functionally disconnected from the rest — with no pathways that would allow them to influence the output — yet when the researcher disabled any one of them the chip lost its ability to discriminate the tones. Furthermore, the final program did not work reliably when it was loaded onto other FPGAs of the same type.
That looks a lot like what we see in developmental networks in living organisms — unpredictable results when pieces are “disconnected”, or mutated, lots and lots of odd feedback loops everywhere, and sensitivity to specific conditions (although we also see selection for fidelity from generation to generation, more so than occurred in this exercise, I think). This is exactly what evolution does, producing a functional complexity from random input.
I suppose it’s possible, though, that Michael Behe’s God also tinkers with electronics as a hobby, and applied his ineffably l33t hacks to the chips when Thompson wasn’t looking.
Carnivals! We’re hawking Carnivals!
The next Tangled Bank will be held on Wednesday, the 4th of July, at Aardvarchaeology. Send those patriotic, all-American links in to the Swedish guy, to me, or to [email protected].
Beyond that, this is an open thread. Say something profound.
A rather unsavory character, Dr Johannes Lerle, was jailed in Germany for violating their laws against neo-Nazism and Holocaust denial. I discussed this earlier this week, and as
Gerard Harbison and Andrew Brown have recently pointed out, he was not a very nice man at all…a bit of a kook, really.
