Illinois became the 21st state to join the United States of America.
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Agatha Christie mysteriously disappeared for 11 days.
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
The US Defense Secretary announced that the US Military would open all combat roles to women.
Spotify announced Drake as the most-streamed star of the 2010s with 28 billion streams, and Ed Sheeran's 'Shape Of You' as the most-streamed track with 2.4 billion streams.
HAL Laboratory's Super Smash Bros. Melee was released by Nintendo for the GameCube.