Once again, I hear the siren song of Toxoplasma, the parasite that dwells in the brains of 50 million Americans.

Toxoplasma gondii is an extraordinary creature, whose exploits I’ve chronicled in previous posts , an article in the New York Times and my book Parasite Rex. This single-celled organism has a life cycle that takes it from cats to other mammals and birds and back to cats again. Studies have shown that the parasite can alter the behavior of rats, robbing them of their normal fear of cats–and presumably making it easier for the parasites to get into their next host.

Continue reading “A Nation of Neurotics? Blame the Puppet Masters?” →

John Noble Wilford has a long, interesting article in today’s New York Times on the rehabilitation of the alchemist. Once the icon of the bad old days before the scientific revolution, alchemy has been emerging in recent years as more of a proto-science. Indeed, a fair number of the heroes of the scientific revolution were dyed-in-the-wool alchemists. Robert Boyle, one of the founders of chemistry, wanted to reform alchemy, not destroy it. He chased after the philsopher’s stone for his whole life. Many of his papers were destroyed in the eighteenth century because they were loaded with discussions of alchemy–which by then had acquired its bad reputation. Boyle’s legacy had to be protected.

Continue reading “Alchemy Without The Shame” →

The Washington Post has an article today called And the Evolutionary Beat Goes On . . .. It is based on some interviews with scientists who are documenting evidence of natural selection in humans. I won’t be surprised if it gets emailed hither and yon, but not for the text, which is based on stuff that’s been out for some months now. No, it’s got a slick animation with the following caption: “A morphing demonstration of human evolution shows the transformation from a small lemur, up the evolutionary ladder into a human: seen here as legendary evolutionary biologist Stephen Jay Gould.”

Continue reading “What A Waste of Quicktime” →

As I wrote in May, there have been some signs that scientists were gearing up to reconstruct the Neanderthal genome. Now it’s official, as Nicholas Wade reports in the NY Times. [link fixed] I’m particularly intrigued that the paleoanthropologists doing this work are teaming up with a hot little biotech company down the road from me in Branford, Connecticut called 454. They had a paper out recently showing how they can sequence DNA much faster than by conventional methods. Combine classic fossil work with the latest in genome sequencing, and voila…

Continue reading “The Neanderthal Genome: File Under Non-Fiction” →

As I browsed the new papers published this week in the Proceedings of the National Academy of Sciences, I was brought up short by this frolicsome picture. It’s a nice example of the visual display of information done right. It shows the spread of primates 55 million years ago across the Northern Hemisphere. I’m always game to learn about what primates were up to in Wyoming and Greenland. But this picture–and the paper that goes with it–have an extra value. They offer some clues to what sort of world we may be creating by pumping billions of tons of carbon dioxide into the atmosphere.

Continue reading “Hopping to Wyoming” →