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Volcanoes of the world: Mount Merapi , Koryak , Sakurajima , Colima, Mauna Loa , Nyiragongo , Mount Rainier , Santa Maria, Santorini , Taal

What is hail, snow pellets and freezing rain, and what the difference between them?

Lakes and rivers Australia.

Where is Cuba - a paradise for tourists

What's the drill?

The symbol of the southern hemisphere - the constellation of the Southern Cross

The first representative of alkenes - ethylene.

What is the matter ?What are the different classes of substances .The difference between the organic and inorganic substances

Deserts and semi-deserts: soil, climate, fauna

One of the best places in the world - Lake Huron

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