NASA’s Ingenuity helicopter became the first helicopter to fly on another planet.
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Charles Darwin, who taught the world the theory of evolution by natural selection, died at 73 years old.
Cardinal Joseph Ratzinger was elected as Pope under the name Pope Benedict XVI.
Johnny Cash released his 'Ring of Fire' single.
NetherRealm's Mortal Kombat, the first game in the franchise reboot, was released for PS3 and Xbox 360.
The Treaty of Frankfurt was signed between Holy Roman Emperor Charles V and Protestants.
