Two corotating vortices, joined together by a slender vortical bridge, drift through an enormous aquarium. Shining through the water’s surface, an expanded laser beam transforms the vortex pair into a moving lens that upwardly projects two black holes encircled by shimmering halos. Vortices may collide with one another (as in the LIGO detections), and if the “wormhole” link between them rips apart, the black holes immediately dissipate.

Tags: Quantum Technologies, Space & the Universe