Billboard publishes its first music chart, Sputnik falls to Earth, The Beatles record together for the last time, and Nancy Pelosi becomes the first female speaker of the House, all on this day.
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NASA
2004: Spirit, a NASA Mars rover, lands successfully on Mars. The rover would perform geological analysis of Martian rocks and planetary surface features, logging nearly five miles on the planet's surface, before becoming stuck in late 2009. Its last communication with Earth was sent on March 22, 2010.