Dmitri Mendeleev presented the first periodic table.
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College students illegally produced America's first X-ray photo.
Using gene therapy, eight babies suffering from 'bubble boy disease' were cured in Memphis, Tennessee.
The idea of the Big Bang Theory being the creation of the universe was supported by scientists.
The discovery of the chemical element Neptunium was announced.
Nikola Tesla tried to explain how the phenomenon of ball lightning works.
