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A burning symbol on a black background

A burning symbol on a black background

A burning symbol on a black background

Underwater tunnel at the bottom of the ocean

Underwater tunnel at the bottom of the ocean

Underwater tunnel at the bottom of the ocean

Purple balls on a dark background

Purple balls on a dark background

Purple balls on a dark background

Exploration into an unexplored galaxy in space

Exploration into an unexplored galaxy in space

Exploration into an unexplored galaxy in space

Moon Desktop Screensaver

Moon desktop screensaver

Moon Desktop Screensaver

The endless misty space of the galaxy

The endless misty space of the galaxy

The endless misty space of the galaxy

There are many beautiful stars in the universe

There are many beautiful stars in the universe

There are many beautiful stars in the universe

Full moon on a black background

Full moon on a black background

Full moon on a black background

The planet Saturn. Outer space

The planet saturn. outer space

The planet Saturn. Outer space

Fantasy girl against the sky

Fantasy girl against the sky

Fantasy girl against the sky

There are many stairs inside the space box

There are many stairs inside the space box

There are many stairs inside the space box

Sad spider-man in the rain on a skyscraper

Sad spider-man in the rain on a skyscraper

Sad spider-man in the rain on a skyscraper

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Система знаний о закономерностях в развитии природы, общества и мышления, а также отдельная отрасль таких знаний. То, что поучает, даёт опыт, урок (в 4 знач.; разг. ).