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Pablo Hernández Flores
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In Faro, Portugal, there is a new sidewalk very precise...

P.S. The local mayor is a former Math Teacher 
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For any triangle, you can draw a circle that fits perfectly inside (the incircle) and also one that connects all its corners (the circumcircle). This shows the path of the centre of the incircle, as a triangle is shuffled around its circumcircle.
code (http://pastebin.com/4XqxxQSL)
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SAIL Amsterdam ... "SAIL Amsterdam is one of the biggest attractions in Amsterdam and the greatest nautical spectacle in the world where scores of tall ships and hundreds of other historical ships gather along the river IJ for an amazing parade. The event is organized once every five years, usually between August 19 to August 23, during which the ships take part in various events such sailor choirs or re-enactments of naval battles. On the wharfs, the SAIL program organizes music and sporting events and children’s activities, and spectacular fireworks shows at night. Aside from the participating ships, thousands of smaller yacht and boats filled with spectators join them creating a unique sight.

The event was first held in August 1975 under the name 'Sail Amsterdam 700' to celebrate the 700th anniversary of Amsterdam. At that time, interest in tall ships, which had sunk to a low since the 1930s when the last commercial tall ships had been built, was starting to rise. The success of Sail Amsterdam 700 led to the establishment of the Stichting Sail Amsterdam (SSA, Foundation Sail Amsterdam). Since then the SSA has been organizing the event every 5 years.

SAIL Amsterdam is believed to be inspired by the Eerste Nederlandse Tentoonstelling op Scheepvaartgebied  — literally, “the First Dutch Exhibition in Shipping Technology”, that was organized in the summer of 1913. In addition to the real ships that visited Amsterdam, there were exhibitions that displayed models of modern boats, and paintings and drawings of historic ships. Concerts and rowing competitions were also organized. As with SAIL Amsterdam, the exhibition ended with a large fireworks.

Sail Amsterdam 2015, the ninth edition of the sailing event, will be held on scheduled date of 19 August until 23 August 23, and is expected to be attended by 2 million people. ..."

MORE: http://www.amusingplanet.com/2015/08/sail-amsterdam.html
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Según Leonardo, el arte pictórico era el medio por excelencia para acceder al misterio y la belleza del mundo, sin embargo, no se trataba del único camino; la pintura era una vía tan válida como la anatomía, la filosofía o la mecánica; tan misteriosa como la poesía, la música o el vuelo de las aves. #DaVinciEnMéxico http://bit.ly/1KkBVgp
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Artista que por su genio extraordinario se ganó en vida la reputación y el sobrenombre de “divino” #MiguelÁngelEnMéxico hasta el 27 de septiembre ¡Entra al sitio de la exposición! http://bit.ly/1fN0e9R 
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Here's a comparison of CD, DVD, and Blu-ray discs in a scanning electron microscope. Same scale for each.
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This is great invention. I have owned the same saw for 20 years. It is the best circ saw I own 

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