Romania and Bulgaria joined the European Union.
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A monk put an end to gladiator fighting in Rome.
A Scandinavian research collaboration created the first-ever internet domain name Nordu.net.
Medical researcher Oswald Hope Robertson performed the first-ever blood transfusion using stored and refrigerated blood.
Ellis Island opened as a US immigration inspection station.
The Union Jack flag was flown for the first time in Dublin, Ireland, to commemorate the union between Great Britain and Ireland.
