Free diver Andriy Wybaczynsky created air-filled toroidal vortexes (rings) underwater, viewed here looking upwards.

Free diver Andriy Wybaczynsky created air-filled toroidal vortexes (rings) underwater, viewed here looking upwards.

By Ian Durkin, Andriy Wybaczynsky, and William Vennard for Fall 2015 Team First.
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