Incidence and prevalence are terms commonly used in describing disease epidemiology. Incidence. Incidence is the rate of new (or newly diagnosed) cases of the disease. It is generally reported as the number of new cases occurring within a period of time (e.g., per month, per year).
Pictured: Incredible gravity-defying ant that can carry 100 times its body weight. This extraordinary image of an ant carrying 100 times its own body weight has scooped first prize in a science photography competition. The photo shows an Asian weaver ant hanging upside down on a glass-like surface and holding a 500mg weight in its jaws.
Some species have a few dozen predatory individuals living in small natural cavities. Some highly organised colonies may cover large territories and have millions of individuals. Ants are usually small, but can carry the weight of twenty ants. Worker ants carry food back to the colony so that other ants and the queen can eat.