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Tuberculosis vaccine (BCG) -

After 13 years of research, French bacteriologists Albert Calmette and Camille Guérin created the vaccine against tuberculosis.

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Tuberculosis vaccine (BCG) -

The Bacille Calmette-Guérin, better known as BCG, saved millions of lives throughout the years.

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Insulin -

In 1921, Frederick Banting and Charles Best managed to take insulin from a dog's pancreas. Shortly after, the first human trial took place.

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Insulin -

The trial was a success and it changed the life of people with Type 1 diabetes forever. The researchers won the Nobel Prize in Medicine for the discovery.

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Lie detector -

The polygraph machine was invented by police officer John Augustus Larson in Berkeley, California.

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Lie detector -

Though its credibility has been disputed ever since, the polygraph is still used to this day as an interrogation tool.

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Rorschach inkblot test -

Swiss psychiatrist Hermann Rorschach is responsible for creating the inkblot test.

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Rorschach inkblot test -

The test consists of 10 inkblots cards. Five of the cards have color, and the other five are black and white. It is used to examine an individual's personality characteristics and emotional functioning.

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Chanel No. 5 -

The iconic scent was invented by Coco Chanel in 1921. It remains very popular to this day.

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Chanel No. 5 -

The distinctive-looking perfume bottle contained a fragrance with notes of vanilla, sandalwood, jasmine, and rose.

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The Laughing Cow cheese -

The Laughing Cow (originally called La vache qui rit) was created in Lons, France, by Fromageries Bel.

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The Laughing Cow cheese -

It was not until years later that the spreadable wedge made its way to other countries around the world.

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‘The Kid’ -

Charlie Chaplin wrote, produced, and starred in this classic silent film.

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‘The Kid’ -

The child was played by Jackie Coogan, who years later played Uncle Fester on the sitcom 'The Addams Family' (1964-1966).

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Einstein Tower -

Designed by German architect Erich Mendelsohn, the astrophysical observatory was built to house a solar telescope designed by the astronomer Erwin Finlay-Freundlich.

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Einstein Tower -

The aim was to find evidence to either prove or disprove Albert Einstein’s general theory of relativity. The expressionist tower is located in Albert Einstein Science Park in Potsdam, Germany.

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The vibraphone -

It's not every day that new musical instruments are invented, but in 1921 it was the vibraphone's turn.

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The vibraphone -

Invented in the US by Hermann Winterhoff of the Leedy Manufacturing Co., the vibraphone is similar to a xylophone but uses metal bars and tubes to create the sounds.

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Braun -

The famous brand was created in 1921 by mechanical engineer Max Braun. It had a wide range of electrical appliances, but became better known for its electric shavers.

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Braun -

For many years the brand was owned by The Gillette Company, but it's now part of the giant Procter & Gamble.

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The Tomb of the Unknown Soldier -

The memorial is located in Arlington National Cemetery in Virginia. It marks the resting place of an unknown soldier from World War I.

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The Tomb of the Unknown Soldier -

Throughout the years, other unknown servicemen were laid to rest in the sarcophagus. The inscription reads “Here rests in honored glory an American soldier known but to God.”

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'Three Musicians' -

Pablo Picasso's famous paintings are prime examples of the Synthetic Cubist style.

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'Three Musicians' -

One version can be seen in New York's Museum of Modern Art (MoMA), while the other version can be found in the Philadelphia Museum of Art.

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Leaded gasoline -

Leaded gasoline, or tetraethyl lead, was invented in the US by General Motors.

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Leaded gasoline -

Its low production cost and the fact that it reduced engine knocking made it an obvious choice. But years later the impact of lead exposure was discovered, and the use of leaded gas was discontinued.

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The term "robot" -

The term, which was used to refer to an artificial person, originally comes from a play called 'R.U.R.,' which stands for Rossum's Universal Robots.

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The term "robot" -

The term was based on the Czech word robota, which means "forced/compulsory labor." Playwright Karel Capek is credited with inventing it.

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Kaffeklubben Island -

American explorer Robert E. Peary is credited with discovering this island off the coast of Greenland’s Cape Morris Jessup, during an expedition to the North Pole.

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Kaffeklubben Island -

But it was not until 1921 that Danish explorer Lauge Koch named the island.  

Sources: (Stacker)

See also: Fascinating ice discoveries frozen in time

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