Schematic diagram of a piano , one of the most popular musical instruments in the world. The diagram (see legend ) shows a grand piano, one of two basic piano configurations, the other being the upright piano. Full-size grand pianos are preferred for concerts, because larger pianos with longer strings have larger, richer sound and lower inharmonicity of the strings.
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Wikipedia picture of the day for January 18
This photo, taken the day after the 2010 Haiti earthquake , shows the damage it caused to the National Palace of Haiti . The palace's collapsed cupola has become a symbol of the devastation caused by the quake. The Haitian government is currently in the process of demolishing the remains in preparation for reconstruction