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The shape, structure and size of the universe

History as a science

The heliocentric system in the works of Copernicus, Kepler, Newton

What is an atom of any substance?

What is the halo effect

Amphoteric hydroxides - the dual nature of the substance

The population of Europe: yesterday and today

Origin of the Universe: the version of the theory, models

Discovering the Reynolds number

Amazing secrets of the moon, the only satellite

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