Why this rainbow cloud formation appeared above Costa Rica - Mashable

A relatively rare cloud formation caused an online sensation in Costa Rica on Tuesday. The rainbow cloud formation was captured by eyewitnesses on the ground and touted as "the end of days" and a "sign of God" by some online.

The cloud was spotted in the communities of San Jose, Parrita, Pavas, Escazu and Hatillo, according to ABC News.

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