The metric system is a widely adopted decimalized system of measurement that derives from decimal numeral system being the consequence of us having 10 digits (fingers and thumbs).

Before the metric system became a standard in Europe, the local laws on measures were set by trade guilds on a city-by-city basis. In Switzerland, the survey of 1838 discovered that the foot had 37 different regional variations.

At the end of 18th century Louis XVI of France commissioned the group of scientists to develop a unified, practical and simple system of measurement to replace the disparate systems used back then. The scientists come up with the metric system that was derived from the properties of natural objects, i.e. the size of the Earth, the density of water, and relations between these. For instance, 1 meter was originally defined as 1/40,000,000th of the polar circumference of the Earth.

Interpol (International Criminal Police Organization, O.I.P.C., ICPO) was founded in Austria in 1923 to facilitate cross-border police cooperation. The word 'Interpol', contraction of 'international police', was chosen in 1946 as the telegraphic address.

Interpol is the world's third largest international organization, after the United Nations and FIFA, with 186 member countries financed by annual contributions of about €41.7 million from its member countries.

It was located in Germany from 1942 to 1946, and its staff and facilities were used as an information gathering unit for the Gestapo. After World War II, the agency was reconstituted and headquartered in Paris. Today the organization is headquartered in Lyon, France.

The United Nations recognized Interpol as an intergovernmental organization in 1971.

Its principal services are to provide its member countries with information on the whereabouts of international criminals, to held seminars on crime detection science, and to facilitate the apprehension of criminals.

The modern history of guide dogs started in Germany in 1916-17 when the dogs were trained to lead soldiers blinded in the WWI. The story says that a doctor was called away from his blind patient and left his German shepherd with the man. He was so impressed by the dog’s behaviour that he decided to start experimenting in training the dogs to be guides for the blind patients.

By 1923 a guide dog training centre had been established in Potsdam. Then the school named the Seeing Eye was established in 1929 in the United States. Great Britain followed suit in 1931with The Guide Dogs for the Blind Association. The first guide dogs in Britain were German Shepherds.

Three breeds are used for guide dog programs around the world - Labrador Retrievers, Golden Retrievers, and German Shepherds. The Labrador Retriever is the most successful breed used for guide dogs. Any guide dog should meet three basic requirements: willingness, health and temperament.

Sir Alfred Joseph Hitchcock, (1899, London, England – 1980, Los Angeles, USA) was a director and producer of over 90 suspense and thriller movies. His career started in 1920th, from the silent film era, and lasted for six decades to the colour motion picture era.

He briefly appeared in all of his movies beginning with The Lodger (1927). In Lifeboat (1944) he, however, appeared on a picture in a newspaper advertisement for weight loss that floated among some debris around the boat. Around that time he had lost a considerable amount of weight from dieting, so he was seen in both the "Before" and the "After" pictures. All his life he was overweight, and was at his heaviest in the late 1930s with over 300 pounds (136 kg).

When Hitchcock was a kid, after acting childishly he was sent by his father sent him to the local police station carrying a note. After reading this note the police officer on duty locked him in a cell for about ten minutes. Later he cited this phobia as the reason he never learned to drive. Moreover, in almost every Hitchcock’s film, the police either have no impact at all, or mistake important clues, or let the culprit go.

World's first female President: Isabel Peron (Argentine)

First "test-tube baby": Louise Brown, born July 25, 1978 in England.

First telephone message by Alexander Graham Bell in 1876: "Mr. Watson, come here, I want to see you."

First person to become an Honorary Citizen of the United States: Winston Churchill in 1963.

First colour comic: "The Yellow Kid" by Richard Outcault, in New York World, 1895.

First instant messenger: ICQ released in November, 1996.