Connoisseurs of evaluation systems should check out "Squirrel Fishing: A New Approach to Rodent Performance Evaluation," a Web page created by Nikolas Gloy and Yasuhiro Endo, students in the Division of Engineering and Applied Sciences at -- where else? - Harvard University.
Our favorite excerpt: "Some insight was gained, however, into ways of focusing squirrels' attention on small (dropped) objects, such as acorns. This led to the formulation of Gloy's First Conjecture that a squirrel will always give up one acorn if another one is thrown nearby."
If nothing else, the squirrel photos are cute.