Italy used its current tri-colored flag for the first time.
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A 57-year-old man received the first transplanted heart from a genetically modified pig.
The Sahara desert was blanketed in snow.
The first-ever photograph of genes was taken.
The first US commercial bank, The Bank of North America, opened in Philadelphia.
The iconic Leaning Tower of Pisa leaned 'too far,' which resulted in its closure.
