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Try to wrap your mind around the stats involving Toxoplasma gondii. The parasite makes rats seek cats, but is it also altering the cultures of entire nations? Skewing the sex ratios of affected populations? Doubling the chances of traffic accidents?

(This article has been edited to reflect factual changes and comments from our learned colleague, Dr. Kalman Rubinson, Associate Professor at NYU's Department of Physiology and Neuroscience, who is careful to point out that he is commenting, not on the research, which he has not read, but only Heimburg's and Jackson's criticisms of current understanding and terminology—areas with which he has more than a passing acquaintance.)

One of the highlights of such annual events as the Consumer Electronics and Primedia Home Entertainment shows has been the demonstrations of loudspeakers from TAD, the professional division of Pioneer Electronics. Designer Andrew Jones is always generous in using recordings brought by visitors, and enthusiastic in explaining the technology behind these beautiful behemoths. Among these speakers' unique features are a beryllium dome tweeter mounted concentrically inside a beryllium midrange cone, and a cabinet built of stacked, carved horizontal sections, for incredible rigidity without using exotic materials or excessive mass. The concentric upper-range driver is a reminder that, some time back, Jones worked for KEF, where the coaxial UniQ driver was developed, but the materials and details of the TAD drivers are all new. While the TAD Model 1s are always good for musical and audiophile thrills, their price is in the upper five figures, which put them out of serious purchase consideration.