Mathematicians Prove Melting Ice Stays Smooth

Drop an ice cube into a glass of water. You can probably picture the way it starts to melt. You also know that no matter what shape it takes, you’ll never see it melt into something like a snowflake, composed everywhere of sharp edges and fine cusps. Mathematicians model this melting process with equations. The equations work well, but it’s taken 130 years to prove that they conform to obvious…

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