The special Mathematicians & Bears issue (vol. 17, no. 3) of the magazine (the Annals of Improbable Research) is now online. It’s got lots about heads and lots about mathematicians and their problems, and about bears, and much more.
The pleasing-paper version was mailed to subscribers a while ago. Click on the magazine cover (below) to download a free PDF, or buy a high-quality PDF. Or subscribe to the paper version. Mel (right) says it’s swell.