> Hi: A mathematical modeller contends that bee foraging flights can be > modeled by diffusion theory. Comments? Well, I got to wondering exactly what the above cryptic and provocative question might mean, so I dug up some references, listed below. I would be interested to know more specifically what is being suggested. "Diffusion theory" is a term that is apparently applied to at least two fields of study, one social and the other(s) physical. (Maybe they are in fact the same theory, but have not had --and likely never will have -- time to adequately consider this possibility). I am assuming the physical/chemical model is suggested here, however, the social theory could also be applied, but if so, the implication would be that we can compare bee experience and behaviour to that of humans. The physical theory has a number of applications, the behaviour of particles (including light) and molecules at junctions, membranes, point sources, and are all considered in the references below. Anyhow, I'm hoping you can provide us with some more detail. http://www.initium.demon.co.uk/fick.htm http://student.biology.arizona.edu/honors98/group6/ http://www.ece.gatech.edu/research/labs/vc/theory/diffusion.html http://student.biology.arizona.edu/honors98/group6/ http://grove.ufl.edu/~eunsook/diffusion2/sld001.htm http://www.physics.helsinki.fi/~ala/diffusion_school.html http://omlc.ogi.edu/pubs/abs/wang93c.html allen