Dmitri Mendeleev presented the first periodic table.
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Doctors in New York successfully performed the world's first face and double hand transplant.
Twelve doctors at Massachusetts General Hospital in Boston performed the first successful reattachment of a human limb – it was the severed arm of a boy.
The discovery of the chemical element Neptunium was announced.
Ether was used as an anesthetic for the first time, by American surgeon Crawford Long, in Athens, Georgia.
Kangaroo fossil research showed that they may have learned to hop over 20 million years ago.
