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Quintessence of Dust

Quintessence of Dust explores science, society, and human nature, focusing on genetics, development, evolution, neuroscience, systems biology, and topics related to scientific literacy. I occasionally discuss intelligent design, creationism, science denial, and other political/social influences on scientific literacy. Additional topics: philosophy, baseball, scientific culture, and Shakespeare. My main theme is scientific explanation.
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Autor Stephen Matheson

1. Get your genome sequenced for $48,000. I would so do this. In the meantime, we bought the Matheson family DNA test for my dad for Father's Day. 2. I'm following this series at Siris: Philosophical Sentences explained. You know the old chestnuts: Cogito ergo sum, God is dead, virtue is its own reward, cleanliness is next to godliness... heh. Brandon tells us where they came from and a little about them.

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Autor Stephen Matheson

Well, it's the first sampler since June, but I won't try to make up for lost time. 1. Todd Wood has started a blog, and it's excellent. His slant is unique -- he's a young-earth creationist -- but his writing is superb and his expertise in genetics and genomics is world-class. My favorite entry so far: a commentary on a recent report describing genetic variation among humans.

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Autor Stephen Matheson

A few interesting and/or important tidbits for Monday.1. Brian at Laelaps provides a list of some very useful books available electronically for free. Authors include slouches like Cuvier, Lyell and Huxley.2. PZ Myers has an excellent new column up at SEED Magazine, discussing the pufferfish genome and referring to Ryan Gregory's excellent work.

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Autor Stephen Matheson

It'll be a breakout week after a slow month on the blog. To the Edge of Evolution – and beyond!1. Ian Musgrave over at Panda's Thumb provides a nice summary of the evolution of clotting systems and some new genomic data that could be used, by ID proponents like Michael Behe, to bolster their claims regarding the "irreducible complexity" of the clotting system.

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Autor Stephen Matheson

Well, no sampler last week, so here are the answers to the last DNA content quiz.Top row: the beluga whale has a slightly larger genome than the brine shrimp (3.29 vs. 2.91).Second row: the damselfly, in all its beauty and intricacy, sports a genome half the size of that of the woodlouse hunter (1.50 vs. 3.00).Third row: the aardvark needs more than twice as much DNA as the American cockroach (5.87 vs. 2.72). Ah, now that must be due to "degree

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Autor Stephen Matheson

Last quiz on genome size, with animals chosen at random. The first quiz post explains what this is all about, the second one has additional commentary, and the answers to both previous quizzes are in previous Weekly samplers.Which organism has the larger genome? This one? Or this one? 1 234Here's some help for you.

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Autor Stephen Matheson

Answers to Quiz 2. (Poor John Farrell.) Row 1: the deer tick on the right has a genome almost 8 times the size of the ladybird beetle's (C value of 2.48 vs. 0.33). I take it that the scholars of RTB would postulate that a deer tick is many times more "advanced" than is a ladybird beetle.