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Melting Gives Ice Block a Push

Author(s): David Ehrenstein

A floating block of ice with an asymmetric bottom is propelled through water by its own melting—a process that may be relevant for icebergs.


[Physics 19, 36] Published Fri Mar 13, 2026

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How to Make a Star-Shaped Droplet

Author(s): David Ehrenstein

An oil droplet within a watery fluid becomes nonspherical at certain temperatures—reversibly transforming from a hexagon to a six-pointed star.


[Physics 19, 29] Published Fri Feb 27, 2026

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