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Majestic tree on the background of the planet

Smooth glass balls on a blue background

The boundless galaxy. scattering of stars

The boundless galaxy. Scattering of stars

I had a dream about a tree in space

Red-black infinity shape

Planet earth as seen in space

If the planets were lined up in one row

A big moon over a mountain lake in the night sky

Abstract illusion peacock tail

Picture. christmas tree toys on a blue background

Picture. Christmas tree toys on a blue background

The robot is getting ready to start from a low start

The alien's figure attacks the victim

The Alien's figure attacks the victim

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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. ).