Italian astronomer Giovanni Donati became the first person to observe the spectrum of a comet.
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The world's first lab-grown bovine stem cell burger was consumed in London.
The Ambato earthquake destroyed fifty towns in Ecuador and killed over 6,000 people.
The first traffic lights in the US were installed in Cleveland, Ohio.
Henry I took to the throne as he was crowned King of England at Westminster Abbey, London.
The Soviet spacecraft Mars 6 was launched.
