Rattleback: Difference between revisions

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==History==
 
Rattlebacks were found by archeologists investigating ancient Celtic and Egyptian sites, and some old Celtic axes demonstrate properties similar to rattlebacks.
Note however that the term "celt" is not related to Celtic people
but to a Latin word for ancient chisel-shaped tools and weapons. It is pronounced with a "c" as in "ceiling" lol .
 
==Physics of the rattleback==