How to behave at a zoo - according to science
(PHYSorg.com Biology)

With October half-term approaching, millions around the world will head to their local zoo to indulge in the Halloween activities and get a little fresh autumnal air in the presence of some extraordinary animals. At this time of year, the animals are still wonderfully active and there`s plenty to see and do. But there are certain things you should be doing as a visitor to ensure that the animals are able to act as naturally as possible within their environments.