Skeletal Anatomy (Posterior View)- reference for ripped out angel wings- obviously as no such thing exists a bit of artistic license would have to be used when deciding how and where the wing bones would join to the skeleton.
visualising sound can be difficult, here someone has recorded a sound and tracked the sound waves and digitally visualised what these would look like, a very interesting out come and very aesthetically pleasing visuals the sound waves make.
This is a video of a Chladni plate experiment in which sand resonates to different frequencies to reveal a particular frequency& SECRET PATTERN. And we all love secret patterns here, right? Think of it as a special door knock.