Queen Victoria opened the Royal Albert Hall in London.
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Rihanna's single 'Umbrella' was released.
Europe's longest bridge officially opened in Lisbon, Portugal.
China's famous Terracotta Army was uncovered by a group of farmers near Xi'an, China.
NASA's Mariner 10 became the first spacecraft to reach Mercury.
Niagara Falls waterfall stopped flowing due to an ice jam.
