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Gravity engine: reality being born before our eyes

What measures the physical quantity

Fraunhofer diffraction.

Punctuation and their role in the text

Soft sign and some of the rules of its use

What is natural selection: for whom he is a friend, and for whom - the enemy?

Call the nearest planet to the Sun!

Apartheid - a legacy of the colonial system

The invention of radio: So who was the first?

What are proteins: the words of the millions of letters

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What is the economic benefit?
Germany's economy today
Unemployment in Russia: a problem which can not be ignored