Science wallpaper on telephone / page 32

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A red rose studded with glitter

Christmas desktop screensaver

Christmas Desktop Screensaver

A woman with two guns

Astronomy: round shapes of cosmic bodies

Motherboard for computer hardware

Modern desktop abstraction

Spaceships roaming the expanses of the universe

A ray of light on a black background

Crysis 3 - hunted becomes a hunter

Crysis 3 - Hunted becomes a Hunter

A cluster of purple space bubbles

Jumping notes on old pages

The sorceress summons the power of the magic staff

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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. ).