Only in the Pacific Northwest…

Seattle is experiencing a surge of homicides (which are probably not statistically significant in number.) Seattle is also experiencing a surge of squid. Some irresponsible journalists are suggesting these two observations might or might not be linked.

These scurrilous allegations should be addressed by a trustworthy source, like The Typing Octopus. I mean, seriously, the murders are on dry land, with guns. I’d suspect the Sasquatch before I would some disgruntled cephalopod…and even there, the fact that the victims weren’t slammed with hurled tree trunks should let Bigfoot off the hook.

Diploblasts and triploblasts

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Carl Zimmer wrote on evolution in jellyfish, with the fascinating conclusion that they bear greater molecular complexity than was previously thought. He cited a recent challenging review by Seipel and Schmid that discusses the evolution of triploblasty in the metazoa—it made me rethink some of my assumptions about germ layer phylogeny, anyway, so I thought I’d try to summarize it here. The story is clear, but I realized as I started to put it together that jeez, but we developmental biologists use a lot of jargon. If this is going to make any sense to anyone else, I’m going to have to step way back and explain a collection of concepts that we’ve been using since Lankester in the 19th century.

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