“Compressed 02”

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This timelapse video shows the spreading of food coloring and a ferrofluid through soap suds surrounding a magnet. Capillary action, the same force that enables sap to flow up through a tree against gravity, helps draw the fluids through the interfaces between the soap bubbles without disturbing the suds. The magnet’s field provides a preferred direction for the ferrofluid flow. (via Gizmodo)

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