Jupiter’s moon was found to have a liquid ocean under a thick crust of ice.
The Galileo probe made the discovery.
Source
Two trains crashed in a snowstorm in Wellington, Washington, USA, claiming the lives of 96 people.
Chemical elements Moscovium, Tennessine, and Oganesson were added to the Periodic Table of Elements.
Dmitry Medvedev was elected as the third President of Russia.
US President Joe Biden announced that Americans no longer needed to wear masks against COVID-19, following guidance released by the CDC.
The Republic of Texas declared independence from Mexico during the Texas Revolution.
