Human activities

Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. Modern science is typically divided into twoor threemajor branches: the natural sciences, which study the physical world, and the social sciences, which study individuals and societies. While referred to as the formal sciences, the study of logic, mathematics, and theoretical computer science are typically regarded as separate because they rely on deductive reasoning instead of the scientific method as their main methodology. Meanwhile, applied sciences

thumb|Best Friends by Romualdo Locatelli (1934)

thumb|right|alt=Cover of Science and Invention Magazine|'BUILD YOUR OWN TELEVISION RECEIVER.' Electrical Experimenter|Science and Invention magazine cover, November 1928

thumb|Braun (company)|Braun ABW30 wall clock designed by [[Dieter Rams and (early 1980s)]] thumb|Victorinox Swiss Army knife thumb|Brionvega radiogram designed by Achille and [[Pier Giacomo Castiglioni]] thumb|alt=An image of cutlery designed by Zaha Hadid|Cutlery designed by architect and designer [[Zaha Hadid (2007). The slightly oblique end part of the fork and the spoons, as well as the knife handle, are examples of designing for both aesthetic form and practical function.]] thumb|Early concept design sketches by the architect Erling Viksjø, exploring the relationships between existing and

thumb|right|Arnold Lakhovsky, The Conversation ()

thumb|right|300px|Competition in Sport|sports. One selection of images showing some of the sporting events that are classed as athletics competitions.

thumb|Statue drinking from a traditional waterskin|alt=Statue of a man drinking|upright=1.2 thumb|upright|A person drinking a glass of milk

thumb|Kamppi Chapel in Helsinki City Centre is a [[community centre, assigned for contemplation.]] thumb|Nature contemplation

thumb|upright|Hitler Youth members performing the Nazi salute at a rally at the Lustgarten in [[Berlin, 1933]]

thumb|Girl guides cleaning a room, 1917 Housekeeping is the management and routine support activities of running and maintaining an organized physical institution occupied or used by people, like a house, ship, hospital or factory, such as cleaning, tidying/organizing, cooking, shopping, and bill payment. These tasks may be performed by members of the household, or by persons hired for the purpose. This is a more broad role than a cleaner, who is focused only on the cleaning aspect. The term is also used to refer to the money allocated for such use. By extension, it may also refer to an office

thumb|right|upright|Illustration from The Secret of the Golden Flower, a Chinese book of alchemy and meditation.

meeting between physician and patient

thumb|200px|American First Lady Bess Truman with Girl Scouts and their volunteer leaders An avocation is an activity that someone engages in as a hobby outside their main occupation. There are many examples of people whose professions were the ways that they made their livings, but for whom their activities outside their workplaces were their true passions in life. Occasionally, as with Lord Baden-Powell and others, people who pursue an avocation are more remembered by history for their avocation than for their professional career.