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A POTD is an acronym for "Photo of the Day", "Picture of the Day", "Post of the Day" or "Poll of the Day". It is a term most commonly used by online digital photography communities as an honor to outstanding photos that are selected daily from among that community's membership. They can either be tagged as POTD or displayed in a special page on that site...

Monochrome photography is photography where the image produced has a single hue, rather than recording the colours of the object that was photographed. It includes all forms of black and white photography, which produce images containing tones of grey ranging from black to white. Most modern black and white films, called panchromatic films, record the entire visible spectrum. Some films are orthochromatic, recording visible light wavelengths shorter than 590 nanometres...

The buttocks (singular: buttock) are rounded portions of the anatomy located on the posterior of the pelvic region of apes and humans, and many other bipeds or quadrupeds, and comprise a layer of fat superimposed on the gluteus maximus and gluteus medius muscles. Physiologically, the buttocks enable weight to be taken off the feet while sitting. Many cultures have also used them as a target for corporal punishment, and for some cultures they play a role in sexual attraction...

China has changed a lot in the last 20 years. Even night life in the large Chinese cities doesn't look much different from the night life in the Wesern countries. A nightclub (also known simply as a club, discothèque or disco) is an entertainment venue which usually operates late into the night. A nightclub is generally distinguished from bars, pubs or taverns by the inclusion of a dance floor and a DJ booth, where a DJ plays recorded dance, hip hop, rock, reggae and pop music...