Since Philip Mallinson has not replied yet, I thought I'd share one of the neatest hyperbola occurrences which he cites, namely, the fact that if you're carrying a sharpened pencil (hexagonal prism type), you've got SIX hyperbolas on you. Of course, this should be reminiscent of the lampshade shadow on the wall.
> > On 3 May 1996, Erica Morse wrote: > > > I am learning to be a teacher at the University of > > Tasmania(Australia)and am doing an assignment on the hyperbola. I > > have already used some of the articles that appear in your newsgroup > > previously. > > However I need some examples of the hyperbola in nature and there did > > not appear to be any here. I have also looked in other places but to > > no avail. Is there anyone that could give me some examples > > please!!!!! > >