Watch: stunning sun halo dazzles Mexico City
On Thursday, residents of Mexico City were treated to a dazzling spectacle when a halo formed around the sun above the Mexican capital.
Haloes like this one appear around the sun or moon when light is refracted by ice crystals in high-altitude clouds.
In spite of the scientific explanation, many thought the halo was cause for concern. Some cited an alien invasion, a bad omen, or even the apocalypse.
Many took to Twitter to post photos of the beautiful, rainbow-like halo.
Click through to the end of the slideshow to see memes people posted about it:
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