The first telephone call was made across the Atlantic – from London to New York.
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The US celebrated the opening of the country's first railroad station in Baltimore.
The iconic Leaning Tower of Pisa leaned 'too far,' which resulted in its closure.
The first-ever photograph of genes was taken.
A 57-year-old man received the first transplanted heart from a genetically modified pig.
Galileo discovered the first three satellites of Jupiter.
