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Allergy is a disorder of the immune system often also referred to as atopy. Allergic reactions occur to normally harmless environmental substances known as allergens; these reactions are acquired, predictable, and rapid. Strictly, allergy is one of four forms of hypersensitivity and is called type I (or immediate) hypersensitivity. Pollen from these plants is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells)...

South Africa has a large variety of wildlife, including snakes, birds, plains animals, and predators. The country has 299 species of mammals and 858 species of birds. Wild Africa is a BBC nature documentary series exploring the natural history of the African continent, first transmitted in the UK on BBC2 in November 2001. The series comprises six episodes. Each concentrates on a particular environment...

Mangalitsa (US spelling), Mangalitza (UK spelling) or Mangalica (original Hungarian spelling) is a name for three breeds of pig grown especially in Hungary and the Balkans known also as a curly-hair hog. It belongs to European unimproved lard-type breeds (as well as Iberian Black and Alentejana pigs) that are descended directly from wild boar populations. The Mangalitsa pig is unusual as it grows a hairy 'fleece', akin to that of a sheep...

The gray wolf or grey wolf (Canis lupus), often known simply as the wolf, is the largest extant wild member of the Canidae family. Though once abundant over much of Eurasia, North Africa and North America, the gray wolf inhabits a reduced portion of its former range due to widespread destruction of its territory, human encroachment, and the resulting human-wolf encounters that sparked broad extirpation...

A zoo (short for zoological park or zoological garden, and also called a menagerie) is a facility in which animals are confined within enclosures, displayed to the public, and in which they may also be bred. The term zoological garden refers to zoology, the study of animals, a term deriving from the Greek zōon (ζῷον, "animal") and lógos (λóγος, "study")...

Kgalagadi Transfrontier Park is a large wildlife preserve and conservation area in southern Africa. The park straddles the border between South Africa and Botswana and comprises two adjoining national parks: Kalahari Gemsbok National Park in South Africa and Gemsbok National Park in Botswana. The total area of the park is 38,000 square kilometres (15,000 sq mi). Approximately three-quarters of the park lies in Botswana and one-quarter in South Africa. Kgalagadi means place of thirst...

A pet is an animal kept for companionship and enjoyment or a household animal, as opposed to wild animals or to livestock, laboratory animals, working animals or sport animals, which are kept for economic or productive reasons. The most popular pets are noted for their loyal or playful characteristics, for their attractive appearance, or for their song...