Astronomer finds that Mercury has molten core

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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<p><a href="http://www.physorg.com/news97422775.html">Astronomer finds that Mercury has molten core</a></p> <p>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.</p>