From Ars Electronic Center website:
The Ars Electronica Center exhibited Protrude, Flow, a work by Sachiko Kodama and Minako Takeno, from 2003 to 2006. Further development of its basic idea led to the Morpho Tower series.
Both works employ ferrofluid. This consists of a liquid medium in which a few nanometer-size magnetic particles are suspended, so that the fluid reacts to a magnetic field.
The spiral enwraps an electromagnet with an enlarged iron core. The strength of the electromagnet determines the movement of the ferrofluid. The fluid can move along the spiral form all the way to its pinnacle—seemingly defying gravity.
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