Dmitry Medvedev was elected as the third President of Russia.
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The original 'King Kong' movie was shown at Radio City Music Hall and RKO Roxy, New York City, US.
Chemical elements Moscovium, Tennessine, and Oganesson were added to the Periodic Table of Elements.
Jupiter's moon was found to have a liquid ocean under a thick crust of ice.
US President Joe Biden announced that Americans no longer needed to wear masks against COVID-19, following guidance released by the CDC.
Automatic street lights first appeared in New Milford, Connecticut, US.
