Nikola Tesla tried to explain how the phenomenon of ball lightning works.
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Nineteen European nations forbade human cloning; however, the UK and Germany refused to sign the agreement.
Ether was used as an anesthetic for the first time, by American surgeon Crawford Long, in Athens, Georgia.
Researchers identified the earliest known prehistoric ancestor of humans.
The first successful administration of insulin to treat diabetes was given to 14-year-old Leonard Thompson.
The first cloned animal from an adult animal cell was announced.
