Bonbibi, Treehouse Point, Fall City, WA. The Bonbibi is balanced on two steel yokes. The yokes spread out the load and allow for tree growth and movement in the wind. A small deck hangs from the beams below and uses the treehouse itself to shelter guests. (Photo by Pete Nelson)

Street fighting in Berlin between Government troops and Spartacists, during the Spartacist uprising which followed Germany's defeat in World War I. (Photo by Keystone/Getty Images). 1919

MAKS – 2011 provides experts and businessmen a rare opportunity to establish contacts at various levels, further development of R&D and production cooperation and search for new business partners.

Men slicing blubber off a large, dead whale. (Photo by Topical Press Agency/Getty Images). Circa 1912

Fuse TV VJ's Marianela and Juliya attend the store opening of “Nigo's A Bathing Ape” with Pharrell Williams January 11, 2005 in New York City. (Photo by Paul Hawthorne/Getty Images)

A fruit importer's lorry at Covent Garden, London, with its driver's cabin in the shape of an apple. (Photo by Harold Clements/London Express/Getty Images). October 1928

Models showcase designs on the catwalk during the SCFASHION Qi Gang Spring/Summer 2012 show on the Fourth day of China Fashion Week Spring/Summer 2012 at the Banquet Hall, Beijing Hotel on October 27, 2011 in Beijing, China. (Photo by Lintao Zhang/Getty Images)