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The lowest and highest temperature on our planet

The work function of the electron: a difficult separation

Replication - a doubling: the cell by cell

Protein: what is needed and what the body?

Andrian Nikolayev - Cosmonaut: A Biography of Hero of the USSR

Parallel to the plane: the condition and properties

Biography: cosmonaut Andrian Nikolayev G.

Latin letters: history and meaning

The frequency of sound, light and Doppler effect

Conservative forces as the political outlook

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