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From Wikipedia:

Human Evolution

Human evolution, or anthropogenesis, is the part of biological evolution concerning the emergence of Homo sapiens as a distinct species from other hominans, great apes and placental mammals. It is the subject of a broad scientific inquiry that seeks to understand and describe how this change occurred. The study of human evolution encompasses many scientific disciplines, most notably physical anthropology, primatology, linguistics and genetics.

 

The term "human", in the context of human evolution, refers to the genus Homo, but studies of human evolution usually include other hominins, such as the australopithecines. The Homo genus diverged from the australopithecines about 2 million years ago in Africa. Several typological species of Homo, now extinct, evolved. These include Homo erectus, which inhabited Asia, and Homo neanderthalensis, which inhabited Europe.

 

Archaic Homo sapiens evolved between 400,000 and 250,000 years ago. The dominant view among scientists is the recent African origin of modern humans (RAO) that H. sapiens evolved in Africa and spread across the globe, replacing populations of H. erectus and H. neanderthalensis. Scientists supporting the alternative hypothesis on the multiregional origin of modern humans (MTO) view modern humans as having evolved as a single, widespread population from existing Homo species, particularly H. erectus. The fossil evidence is insufficient to resolve this vigorous debate, while studies of human population genetics have largely supported a recent African Origin explanation.

 

Pig

 

Pigs are a genus of even-toed ungulates within the family Suidae. The name hog most commonly refers to the domestic pig (Sus domestica) in everyday parlance, but technically encompasses several distinct species, including the Wild Boar. Swine is a non-declensive noun generally used to describe a herd of pigs rather than an individual, however it may often be implied in a pejorative manner to any living being expressing pig-like behaviour.

 

With around 2 billion on the planet, domestic pigs are also by far the most numerous pig species. Pigs are omnivores, and despite their reputation for gluttony, they are generally social and intelligent animals.

 

Description and behavior

 

A pig has a snout for a nose, small eyes, and a small tail, which may be curly, kinked, or straight. It has a thick body, short legs, and coarse hair. There are four toes on each foot, with the two large middle toes used for walking.

 

Pigs are omnivores, which means that they consume both plants and animals. Pigs will scavenge and have been known to eat any kind of food, including dead insects, worms, tree bark, rotting carcasses, garbage, and even other pigs. In the wild, they are foraging animals, primarily eating leaves, grasses, roots, fruits and flowers. Occasionally while in captivity, pigs may eat their own young if they become severely stressed. A typical pig has a large head with a long snout which is strengthened by a special prenasal bone and by a disk of cartilage in the tip. The snout is used to dig into the soil to find food and is a very sensitive sense organ.

 

Pigs have a full set of 44 teeth. The canine teeth, called tusks, grow continuously and are sharpened by the lowers and uppers rubbing against each other.

 

Pigs that are allowed to forage may be watched by swineherds. Because of their foraging abilities and excellent sense of smell, they are used to find truffles in many European countries. Domesticated pigs are commonly raised as livestock by farmers for meat (called pork), as well as for leather. Their bristly hairs are also used for brushes. Some breeds of pigs, such as the Asian pot-bellied pig, are kept as pets.

 

Breeding occurs throughout the year in the tropics, but births peak around rainy seasons. A female pig can become pregnant at around 8-18 months of age. She will then go into estrus every 21 days if not bred. Male pigs become sexually active at 8-10 months of age.[4] A litter of piglets typically contains between 6 and 12 piglets.After the young are weaned, two or more families may come together until the next mating season.

 

Pigs do not have functional sweat glands, so pigs cool themselves using water or mud during hot weather. They also use mud as a form of sunscreen to protect their skin from sunburn. Mud also provides protection against flies and parasites.

 

Pig Olympics

 

The Pig Olympics are a sporting event organized by and for specially-bred and trained piglets.

 

The 2006 competition was held in Moscow, Russia, while in 2005 the Pig Olympics were held in China. The Pig Olympics will next be in 2009 in St. Louis.

 

Events within the competition include pig-racing (over an obstacle course), pig swimming (introduced at the 2006 Pig Olympics), and 'pigball' or 'swineball' which is much like football or soccer.

 

The piglets in the games are not eaten, instead, they are bred for the next generation of pig-players.

 

 

 

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