The Bank of England printed the first one-pound and two-pound banknotes.
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Jupiter's moon was found to have a liquid ocean under a thick crust of ice.
The US spacecraft Pioneer 10 launched.
US President Joe Biden announced that Americans no longer needed to wear masks against COVID-19, following guidance released by the CDC.
The Concorde airplane was tested for the first time in Toulouse, France.
An 8.4 magnitude Sanriku Earthquake and tsunami rocked Japan.
