Macaroni penguin been considered separate species, but the close similarities of their DNA sequences has led some, such as the Australian ornithologists Les Christidis and Walter Boles, to treat the royal as a subspecies of the macaroni. The two species are very similar in appearance; the royal penguin has a white face instead of the usually black face of the macaroni. Interbreeding with the Indo-Pacific subspecies of the southern rockhopper penguin ("E. chrysocome filholi") has been reported at Heard and Marion Islands, with three hybrids recorded there by a 1987–88 Australian National Antarctic Research Expedition. The macaroni penguin is a large, crested
Macaroni and cheese frozen macaroni and cheese available in the United States. "Macaroni and cheese loaf" can be found in some stores. A variety of packaged mixes which are prepared in a sauce pan on the stove or in a microwave oven are available. They are usually modeled on Kraft Macaroni & Cheese (known as Kraft Dinner in Canada), which was introduced in 1937 with the slogan "make a meal for four in nine minutes." It was an immediate success in the US and Canada amidst the economic hardships of the Depression. During the Second World War, rationing led to increased popularity for