User:Whatamidoing (WMF)/Sandbox

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Music
Music is made around the world.

The music may be a simple song for children, like this:

The music may be part of a complex symphony. This score shows part of a famous section of the Symphony No. 9 in D minor by Ludwig van Beethoven:

Languages in the world
The Egyptians used pictures to write their language. The pictures are called hieroglyphics. This is what they look like:

Once upon a time, Greek and Latin were spoken by most traders in the Western world. Before then, traders learned the languages of nearby cities. Ancient traders did not travel around the world.

Some languages are spoken in many parts of the world. These are called world languages. As of 2015, English is the most common world language. Previously, French was the most popular language in the West. Chinese was used by traders in all of East Asia for centuries. Arabic is common in the Middle East, Northern Africa, and other parts of the world.

World health
The World Health Organisation (French: Organisation mondiale de la santé ) is an international organisation for public health. It is part of the United Nations. The World Health Organisation began in 1948. Its goal is for everyone in the world to be healthy and safe. It studies public health and tells governments and other organisations how to help people become healthy.

The organisation counts the number of people with health problems. These health problems include influenza, HIV infection, and depression. It also counts the number of people who have other problems, such as dirty water, hunger, and violence.

Mental health is also important. People with mental health problems such as depression often die ten years early.

The World Bank is also interested in health. Poor health affects the economy of a country.

Poetry
This poem by John Donne mentions the world:

Her death hath taught us dearly that thou art Corrupt and mortal in thy purest part. Let no man say, the world itself being dead, 'Tis labour lost to have discovered The world's infirmities, since there is none Alive to study this dissection; For there's a kind of world remaining still, Though she which did inanimate and fill The world, be gone... The entire poem can be read at Wikisource.

Shape of our world
Our world is not a perfect sphere. It is slightly flattened.

The mathematical formula for measuring the flatness of a sphere is

$$\begin{align} f&=\frac{a-b}{a}. \end{align}$$

For our world, $f\,\!$ is approximately 0.3%. The Moon is rounder. For the Moon, $f\,\!$ is approximately 0.1%. Jupiter is flatter. For Jupiter, $f\,\!$ is approximately 6.5%.

Local planets
Our world is a planet. There are several types of planets in our solar system: These are the planets in our solar system:
 * Terrestrial planets
 * Giant planets
 * Gas giants
 * Ice giants
 * Four terrestrial planets
 * Mercury
 * Venus
 * Earth
 * One satellite, called the Moon
 * Mars
 * Two gas giants
 * Jupiter
 * Four large satellites
 * 63 other satellites
 * Saturn
 * 62 satellites. Some are very small.
 * Seven are large. The largest, called Titan, is larger than the planet Mercury.
 * Two ice giants
 * Uranus
 * Five satellites
 * 22 other satellites
 * Neptune
 * One satellite, called Triton