THIS DAY IN SCIENCE: First Jukebox Installed in 1889

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Spinning Sphere of Molten Sodium

An experiment on how turbulent convection in Earth’s core makes a magnetic field

Get a free audiobook with a free 30 day trial at http://www.audible.com/Veritasium or text Veritasium to 500-500

Huge thanks to Prof. Dan Lathrop and team: http://ve42.co/Lathrop

Companion video to explain Earth’s magnetic fields in more detail: https://youtu.be/lWHxmJf6U3M

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