Aug 10, 2022
If you've ever stirred a cup of tea with loose leaves in it, you've probably noticed that the leaves tend to swirl into the center of the cup in a kind of inverted whirlpool. (Video and image credit: S. Mould)
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If you've ever stirred a cup of tea with loose leaves in it, you've probably noticed that the leaves tend to swirl into the center of the cup in a kind of inverted whirlpool. (Video and image credit: S. Mould)