The wave-like nature of Asperitas clouds becomes apparent when viewed in time-lapse.

Video credit: Alex Schueth

Full 4K version: https://www.youtube.com/watch?v=Jz7BgxrVmiQ
Further reading: https://en.wikipedia.org/wiki/Asperitas_(cloud)

Undulatus Asperatus

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@wonderofscience How wonderful! Undulating, mesmerising, a tad creepy…😆