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Jellyfish on a bright blue background

Interesting underwater animals

3d graphics. christmas abstract

3d graphics. Christmas Abstract

A man running away from the epicenter of the explosion

Spider-man looks at the city

Spider-Man looks at the city

A snow-white dragon standing on the rocks

The moon planet on a beautiful background

The Moon planet on a beautiful background

Galactic fantasy for a screensaver

Moonlight sonata in our galaxy

Moonlight Sonata in our Galaxy

Fantastic colors of the universe

Apple logo on the background of astronomical light

Fantastic unusual glow of planets

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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. ).