What these balls do may seem absurd, but the truth will surprise you !
![What these balls do may seem absurd, but the truth will surprise you !](https://img.wtvideo.com/images/original/1667.jpg)
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We should not always trust the first impression, because the appearance of objects depends on ... points of view. In this case a curious optical effect creates the impression that these balls contradict the basic laws of physics, disobeying with their motion to gravity, but instead ...
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