This is a great question. In fact, the answer is
no, not all bubbles are round.
bubbles are round except when they are moving.
The short explanation for this is that when
bubbles move through a fluid, such as air bubbles
moving through water or carbon dioxide bubbles
through soda, they are pushed on by the substance
they are moving through in a way that deforms the
bubble and causes it to lose its round shape. The
substance the bubble moves through pushes on it
unequally, with greater force pushing on the
leading edge of the bubble in the direction it is
moving and less force pushing on the trailing edge
of the bubble. As a result, the leading edge of
the bubble tends to flatten a little, causing the
bubble to look more like a bowl than a round ball.
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