Astronomer finds that Mercury has molten core

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Jean-Luc Margot assistant professor of astronomy at Cornell University uses a raw egg (right still) and a cooked egg (left spinning) to illustrate how an objects spin state can reveal information about its interior. Credit: Lindsay FranceCornell Univ ...
Jean-Luc Margot, assistant professor of astronomy at Cornell University, uses a raw egg (right, still) and a cooked egg (left, spinning) to illustrate how an object's spin state can reveal information about its interior. Credit: Lindsay France/Cornell University Photography

Chefs have long used a simple trick to differentiate between a raw and hard-boiled egg. By spinning an egg and watching how it behaves when the spin is disrupted, it's easy to tell whether its interior is solid or liquid.


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