Саморъчно направено видео на <a href="https://bg.wikipedia.org/wiki/%D0%9E%D0%BB%D0%BE%D0%B8%D0%B4" class="extiw" title="bg:Олоид">олоид</a>, търкалян по равнина, заснето в <a href="https://bg.wikipedia.org/wiki/%D0%A2%D0%B5%D1%85%D0%BD%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8_%D0%BC%D1%83%D0%B7%D0%B5%D0%B9_%D0%B2_%D0%9C%D1%8E%D0%BD%D1%85%D0%B5%D0%BD" class="extiw" title="bg:Технически музей в Мюнхен">Техническия музей в Мюнхен</a>, Германия
Vassia Atanassova - <a href="//commons.wikimedia.org/wiki/User:Spiritia" title="User:Spiritia">Spiritia</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>