The University of Lund Wind Tunnel
has been designed for specially trained birds to fly in. The page includes diagrams of the wind tunnel design and information about the research and birds. This looks like way too much fun...
I recently upgraded my old G3 Mac tower to OS X
(10.1). The only let down so far is that my old serial printer won't work with the new OS, but you can get around this by going to startup disk
setup and telling it to boot with the old 9.x OS. OS X is very nice looking, seems to run very well, and fun to explore. I've just barely started playing with the Unix system underlying it, but it's cool to have all of that familiar Unix (including Perl) available. You can get a taste for some of the new OS X features in this article: Industrial-Strength Wireless Webcam