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D. Sean and the Dinosaurs
S: In the latest scientific American, which I was just showing Adrian, there are these tomographic projections of mosquito knees. C: Mosquito knees? S: That shows the sort of resolution that you can get from these different techniques. But then one of the things that you can do, like once you can get tomographic projections of these things or you can build models of it (you know, wavelets are one of the techniques) you could use all these techniques for building models of, basically polygon approximations of the fossils or the organisms. Obviously this will work very very well with insects since there aren't that many insects systematists— that is, people that study systematics— in the world, it's sort of a dying specialty. But you know if you could digitize enough of these creatures and build the representation in a way that you could search by shape, and find analogous structures, in other organisms, that might be a way to help draw relationships between different creatures. You could look at— say if you sequence the DNA for different creatures you might find convergent structure in a wing or a leg or something like that, long after these two lineages divided, and that might give you some information about what sort of things were likely to arise, and how the mechanism of DNA expressing itself can be constrained and not constrained, because you can build these better models of the shapes of things. If you digitize a whole range of species with this technique, you wouldn't even need to kill them or take them apart it's just fairly low doses of x-rays. You can look at them over time and establish growth patterns and if you could specify what those growth mechanisms were mathematically you might be able to look for differences between species. Or if you found a specimen, you could say, "well its not like any of the ones I had before, but it fits in between here and here so it's the same species or something. With insects its fairly hard, because they change and they molt, they can change fairly rapidly in body plan, but I think it's one of the interesting things in science, you got all these techniques, its true in medicine is well, you got all these techniques that can get you more and more data, but the traditional form presenting them is such that people haven't adjusted. C: so, in a way, it seems like it's not just a change in scope and scale, but a qualitative change in the way the data is represented, so that you can actually do different kinds of experiments. S: Sure, imagine that, for the home market, you could, if you had these polygon representations of dinosaurs, there's no reason you couldn't print them out in three dimensions, and have life size dinosaur kits for cheap. [Laughter] you know, out-replicate Barney on the planet, that would be a very important thing to do. But also for scientific study, just being able to compare— I mean right now if you want to measure something on a bone, you have to call up the person who has that specimen, and asked them to measure it. If you had these representations you could play around with it, and you can probably find patterns that right now you couldn't. But it's not enough just to accumulate the numbers, you need a way that people can digitize lots of stuff quickly, and safely, and the mechanism for sharing it, visualizing the data. And because I'm curious about lots of different things, making it accessible is important— because what do I know about this stuff other than what I can read in the gutter or in Science or Nature. You know, I'm a dillettante. And so the idea that instead of having to read these long descriptions, you can just say that there's this— you know, say off the sqasimosal bone, there's this sort of process that's unusual, I can say, well, so I know that's on the head [points]... it's on the skull... but what does that look like in other creatures? And since I don't have a command of the literature, and I haven't seen a lot of these specimens, its hard for me to make the instant association: 'Oh its like this in Triceratops, but not in Proceratops.' You know, to be able to navigate back and forth like that, would be very fun for a dillettante like me. It might be of scientific use as well. |
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Last Modified 11-Sep-99 9:24 PM ckelty@mit.edu Go Back to the Start |
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