Quick Fact: Mars Curiosity Rover hummed “Happy Birthday” to itself once in…

Mars Curiosity Rover hummed “Happy Birthday” to itself once in order to celebrate the mission’s first successful year in 2013. It did not sing “Happy Birthday” to itself ever since.. Ref: www.theatlantic.com/science/archive/2017/08/why-the-curiosity-rover-stopped-singing-happy-birthday-to-itself/536487/

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