Old spiders

Two short articles in this week’s Science link the orb-weaving spiders back to a common ancestor in the Early Cretaceous, with both physical and molecular evidence. What we have is a 110-million-year-old piece of amber that preserves a piece of an orb web and some captured prey, and a new comparative study of spider silk proteins that ties together the two orb-weaving lineages, the Araneoidea and the Deinopoidea, and dates their last common ancestor to 136 million years ago.

Araneoids and Deinopoids build similar looking webs—a radial frame supporting a sticky spiral—but they differ in how they trap prey. Deinopoids spin dry fibers that they fluff into threads that adhere electrostatically to small insects; Araneoids secrete glue onto the the strand, which takes less work (no fluffing), and is much more strongly adhesive. The differences are enough to make one question whether there was a single origin of orb weavers, or whether the two groups independently stumbled on the same efficient form of architecture.

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Sing along with Cthulhu

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Feeling musical this morning? Stephanie Ching sent me links to some lyrics. An old User Friendly cartoon combines Cthulhu, zombies, and brains, and then there’s the unspeakable: this guy has written a song for John Tesh. If anything is going to rouse the sleeping Old Ones that lie in lost R’Lyeh, it’s got to be New Age caterwauling.

Quick! To scrub the thought of New Age Lite muzak out of your brain, Unfogged provides a cure: visualize your scrotum rupturing. Think about epididymitis and Fournier’s gangrene. There, can’t you feel the nightmare ebbing?

Carnivalia, and an open thread

I’ve been very, very bad at keeping up with all the carnivals, so here’s a quick roundup.

As usual, talk about whatever you want in the comments (at last, a place where the Coulter defenders can be evasive with permission!)