Science wallpaper on telephone / page 56

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Cosmic sky with a scattering of stars

Blue architectural structure

Planets, the sun, the milky way in space

Planets, the sun, the Milky Way in space

Weapons are war, and war is death

Abstract pattern with stars

The mystery of the galaxy, the beauty of the planets

A beautiful blue galaxy

A ball with geometric shapes on a plane

Artificial intelligence in colors

Planet moon, space infinity

Planet Moon, space infinity

Nice woman. beautiful background

Nice woman. Beautiful background

Photo of a group of creative people

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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. ).