**Note** This is much cooler with the sound on! This is the φ (phi) top. It's made of solid brass in the shape of a prolate elIipsoid- and the name of the top is derived from the following design requirement: the ratio of the semi minor (short) axis to the semi major (long) axis is made equal to the mathematical constant the golden ratio φ. Invented by astrophysicist Kenneth Brecher, this top stands up vertically (when spun with sufficient rotational velocity) due to physics similar to that of t
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**Note** This is much cooler with the sound on! This is the φ (phi) to…
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