The Romans played with palindromes in the form of the famous "Sator Square." Today, modern artists have created "ambigrams" — words and phrases... Publius Paquius Proculus, they say, invented pizza ...

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If I started to tell you about something called “ambigram,” you might think it’s one of two things: either a new graham cracker that doubles as a sleep aid or a new social media platform for people ...