Медведев Александр Павлович
Видные ученые России
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![Почему снежинки такие разные? [Veritasium]](https://sun9-43.userapi.com/ikB60E0uWSISjYiOzJoDWNYsVqIyCllqcVG8RA/gUUVkGPWHOs.jpg)
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