Siran is the biggest human miracle of history, if you want to see the mirror of human efforts,

"Siran is the biggest human miracle of history, if you want to see the mirror of human efforts, you must go to the head once, 'you will be surprised, but what is the siren? Before knowing this, we know some of the great facts of the universe. I have to know.

"A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and ... The electrically powered cylinder siren used to alert the town of Lowestoft during World War Two. .... See also: Michael Lamm, "Feel the noise: The art and science of making sound alarming," Invention and Technology Magazine, ...
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Our universe is 13 billion 80 million years old 'the land has been constructed five billion years'. Our universe had borne a terrible explosion. This explosion is called Big Bang. The Big Bang is estimated to be around 350 billion and 720 billion in the universe. Little galaxies are born, 'Every galaxy has several billion billions of planets and stars from earth.' This world is still spreading 'where it will go', how big it is and how tall it is. Despite scientific development only 4% know that '96% of the universe secrets are not beyond our coverings.

For this wonderful work, spacecraft was discovered in the suburbs and Switzerland and France together forming a laboratory. It is not just a laboratory called siren. It was not a matter of two countries and just a few scientists. Slowly 177 universities from 38 countries of the world and three thousand physics professors joined the project. The censorship made 27 kilometers long metal tunnel 100 meters below the ground in the first part.