Being adolescent in other cultures:

Changing our image:
Tatoos:
A tattoo is a modification of the color of the skin which creates a drawing, a figure or a text with ink or some other pigment under the skin of a person or an animal.Currently, there are tattoos that disappear shortly after drawing it and called temporary, others remain during all life except in the case of removed with laser. The reason that the latter remain immutable is ink sits in the layer of the dermis, located under the epidermis. The epidermis is the outermost layer of skin that constantly renews its cells. However, the metabolism of the dermis does not imply this type of Exchange and, therefore, ink is not deleted.

Social network:

History of twitter:                                                                                                                                             Twitter began as a project research and development of Obvious, LLC, a small start-up in San Francisco during March 2006. The original name of the product was twttr, inspired by Flickr. The principle was used internally by the company until it was officially released to the public in October the same year. The service quickly began to gain followers and in March 2007 won the South by Southwest Web Award in the category of blog.
Jack Dorsey is the father of this web application and current Chairman of the Board of Directors of Twitter, Inc., company that arose as a result of Obvious, LLC and the success achieved by Twitter. At the beginning of 2008, the Twitter team was composed of 18 persons, during 2009 have quadrupled its workforce and continue to grow.
While Twitter was used for a short time as Google AdSense advertising services, decided to discard revenue by advertising to get more users, meanwhile financed capital investment risk. In September 2009, Twitter announced changes to the terms of service, leaving open the possibility to include advertising in their services