An owl gliding through a cloud of helium-filled soap bubbles reveals wingtip and tail vortices.
📽: Usherwood et al. https://video.nostr.build/8f733a811a88114babb8181b5c4fea660d55863a8830b4392cf37507abcd8ee8.mp4
Discussion
Where does one get helium filled soap bubbles?!