Boris Rosing
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Boris Lvovich Rosing was a Russian scientist and inventor of television.
Boris Rosing featured on 2019 postage stamp of Russia
Selenium
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Selenium is a chemical element; it has symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It s
Structure of hexagonal (gray) selenium
Selenium is named after Selene, the Greek Goddess of the Moon
Native selenium in sandstone, from a uranium mine near Grants, New Mexico