Lucas Brouwers, one of the new bloggers at Scientific American’s snazzy new blog network, takes a look at an intriguing paper (free pdf). The authors of the paper in examined many different strains of E. coli and come to a remarkable conclusion: they’ve been splitting apart so far that they may soon no longer be a single species. Check it out. (And, if you have a lot of time to spare, check out the rest of Scientific American’s fine line-up of bloggers.)

Originally published July 8, 2011. Copyright 2011 Carl Zimmer.

I’ve never met John McPhee, but he’s always been lurking around my office. I’ve got a number of his books, and I always keep an eye out for his latest piece in the New Yorker. I can’t count the number of times reading a few lines of his stuff helped get me revved up again for writing.

Recently, Alexis Madrigal of the Atlantic invited me to participate in a Neiman Storyboard series called “Why’s This So Good?” Writers pick out a good piece of long-form journalism and try to figure out what makes it so. Having just revisited out McPhee’s sprawling 1987 epic on engineering the Mississippi, “Atchafalaya,” I chose it for my object of study. Here’s my take. And, if you have a free moment to quaff 28,000 words, here’s McPhee’s piece.

Originally published July 7, 2011. Copyright 2011 Carl Zimmer.

For several decades now, biologists have been puzzling over sex. In some ways, it seems like a huge waste of effort.

Sexual reproduction requires splitting a species into two sexes, only one of which will be able to produce offspring. There are some species of animals that do without males; the females simply trigger their eggs to develop into embryos without any need for sperm. All the offspring of an asexual animal can produce offspring of their own, instead of just half. So it would make sense that genes that gave rise to asexual reproduction would win out in the evolutionary race.

Continue reading “Why is there sex? To fight the parasite army”

Thanks to everyone who scooped up autographed copies of At the Water’s Edge (72 are out the door as of this writing, and 8 are left). My shelves are getting close to being purged of author’s copies–which is good, since those shelves are about to come crashing down for some home renovation.

Continue reading “Soul-Made-Flesh-A-Thon: A Sale to Clear Out the Brain”