Science wallpaper on telephone / page 40

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Underwater tunnel at the bottom of the ocean

Purple balls on a dark background

Moon desktop screensaver

Moon Desktop Screensaver

The endless misty space of the galaxy

There are many beautiful stars in the universe

Cosmic nebula on the background of the galaxy

The planet saturn. outer space

The planet Saturn. Outer space

Fantasy girl against the sky

There are many stairs inside the space box

Sad spider-man in the rain on a skyscraper

Silver robot on a black background

A spaceship. moon. earth

A spaceship. Moon. Earth

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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. ).