a vortex pulls to the center

[miriam_e]

Why, when you stir a cup of tea, do the tea leaves all move to a neat pile in the center? Why doesn't it simply mix everything up and distribute the leaves evenly throughout the volume?

Comments

Re: nope it wasn't a rhetorical question

[miriam-e.livejournal.com]

Zeno's paradox (http://en.wikipedia.org/wiki/Zeno%27s_paradox)