Maria Lucimar Pereira is arguably the world's oldest living person: a member of the Kaxinawá tribe, Pereira lives in the Brazilian Amazon and will be soon celebrating her 121st birthday, according to Survival International.

Pereira has had an official birth certificate approved in 1985 that states her year of birth as 1890, meaning she would have been 24 when World War I broke out, 49 when World War II commenced, and 79 when the first man set foot on the moon.

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