In 1992, University of Melbourne researchers TT Lim and TB Nickels wrote a scientific paper titled "Instability and reconnection in the head-on collision of two vortex rings." The research so inspired Smarter Every Day's Destin Sandlin that he launched his own research effort to study the phenomenon and capture it using high-speed video. Four years later, he's shared this magnificent video above. You can also watch all 12 hours of the 1x speed video below.
https://www.youtube.com/watch?v=Cm9l8-qngjM
