An Old Man and his Sheep

Humans (known taxonomically as Homo sapiens, Latin for "wise man" or "knowing man") are the only living species in the Homo genus. Anatomically modern humans originated in Africa about 200,000 years ago, reaching full behavioral modernity around 50,000 years ago.

Humans have a highly developed brain and are capable of abstract reasoning, language, introspection, and problem solving. This mental capability, combined with an erect body carriage that frees the hands for manipulating objects, has allowed humans to make far greater use of tools than any other living species on Earth. Other higher-level thought processes of humans, such as self-awareness, rationality, and sapience, are considered to be defining features of what constitutes a "person".

Humans are uniquely adept at utilizing systems of communication for self-expression, the exchange of ideas, and organization. Humans create complex social structures composed of many cooperating and competing groups, from families to nations. Social interactions between humans have established an extremely wide variety of values, social norms, and rituals, which together form the basis of human society. With individuals widespread in every continent except Antarctica, humans are a cosmopolitan species. As of November 2011^[update], the human population was estimated by the United Nations Population Division to be about 7 billion, and by the United States Census Bureau to be about 6.97 billion.

The demographics of Estonia in the twenty-first century are the result of historical trends over more than a thousand years, just as for most European countries, but have been disproportionately affected by events in the last half of the twentieth century. Impact from the rise and fall of the Soviet Union, including the annexation and eventual independence of Estonia, has had a major effect on Estonia's ethnic makeup and educational achievement.

Languages spoken in Estonia are largely reflective of the ethnic groups composing the country, and thus have changed with historical trends affecting the ethnic makeup of the country. Religion plays a small part in the lives of most Estonians, largely as a result of the Soviet occupation from 1944–1991.

Overall, the quality of life indices for Estonia are reflective of a modern industrial state, with one major exception: The population of Estonia is shrinking. While there are other European countries like Estonia with a birthrate that is at less than replacement levels, Estonia lacks the immigration found, for example, in Germany. As such, the population is on a slow downward trend. However, in the most recent years the decline has slowed down considerably and according to preliminary figures the population stabilized in 2010. If the current trends continue, some population growth can be foreseen for the coming years.

Omnivores (from Latin: omni, meaning "all, everything"; vorare, "to devour") are species that eat both plants and animal material as their primary food source. They often are opportunistic, general feeders not specifically adapted to eating and digesting either meat or plant material primarily. Many depend on a suitable mix of animal and plant food for long-term good health and reproduction.

Although the term omnivore literally means "eater of everything," omnivores really cannot eat everything that other animals eat; they can eat only things that are moderately easy to acquire while being moderately nutritious. For example, most omnivores cannot live by grazing (not nutritious enough), nor are they able to eat some hard-shelled animals or successfully hunt large or fast prey (difficult to acquire).

Although there are cases of carnivores eating plant matter, as well as examples of herbivores eating meat, the classification "omnivore" refers to the adaptations and main food source of the species in general, so these exceptions do not make either individual animals nor the species as a whole omnivorous.

Pigs are a well-known example of omnivores. The crow is another example of an omnivore.

Humans are different from other omnivorous species, and it is disputed whether humans are actually herbivores. While they share virtually none of the characteristics of most other omnivores or carnivores, such as claws, fangs, or short digestive tracts, the majority of humans eat as omnivores, consuming on a daily basis both plants and animals. Humans have rounded molars, long intestines, and blunt canine teeth, but they also have a reduced cecum and engage in cooperative group-hunting.