Non veni pacem mittere, sed gladium.
As the 5th anniversary of Curiosity's monumental landing rolls around, it's especially sentimental. On this day, the lonely rover performs a special task: it sings ♬ Happy Birthday ♬ to itself all alone. Adorable, scientifically impressive, or just... a little sad? - http://goodstuffsworld.blogspot.com/2017/08/happy-birthday-curiosity.html