Actress Tanga Chisholm (L) and actor Stephen Kramer Glickman attend the Ok! Magazine Toasts Hollywood's Sexiest Singles event at the Lexington Social House on April 14, 2011 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images)

Music fans attend Day 1 of the Coachella Valley Music & Arts Festival 2011 held at the Empire Polo Club on April 15, 2011 in Indio, California. (Photo by Frazer Harrison/Getty Images)

Three workers demonstrating the different types of gas masks used in mine rescue work. (Photo by Fox Photos/Getty Images). December 1925

Adele Clark, aged 8, looks at an animatronic Gallimimus dinosaur at the Natural History Museum on April 20, 2011 in London, England. The Age of the Dinosaur is a summer exhibition combining animatronic models, fossils and CGI film footage. (Photo by Matthew Lloyd/Getty Images)

The mummy of Yuya thought by some to be Josua who, after Moses, led the Hebrews into the Promised land and logically would be the father-in-law of Amenophis III, at Cairo Museum, Egypt. (Photo by Patrick Landmann/Cairo Museum/Getty Images)

A group of children and their dog playing an Easter game in Cardiff. The game involves trying to eat an Easter egg off a piece of string without using their hands. (Photo by Richards/Fox Photos/Getty Images). 26th March 1937

From the waters edge a New York policeman urges two young children to put their bathing costumes back on. (Photo by Ed Clarity/Keystone/Getty Images). July 1949

In April 2011 last factory in the world on manufacture of typewriters was closed. The epoch of typewriters has ended...

Photo: A model of a commercial typewriter from 1867. (Photo by Topical Press Agency/Getty Images). June 1923