Science wallpaper on Desktop / page 44

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A big tree is swaying in the wind

Air transport with a photographer recording what is happening in the air

Close the planet art

Close the Planet art

A planet from outer space. a copy of the globe

A planet from outer space. A copy of the globe

That's how planets appear

The beauty of the cosmos. the vast galaxy

The beauty of the cosmos. The vast galaxy

Fabulous moth on the background of a round shield

Vector image for desktop

Twinkling starry sky over the meadow

Fancy graffiti for the desktop

Energetic desktop screensaver

Water droplets on the glass with blurred lights

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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. ).