As a left-handed person, I feel compelled to mention this.
A recent paper with the engaging title ‘Parallel Emergence of True Handedness in the Evolution of Marsupials and Placentals’ observes that ‘Bipedal macropod marsupials display population-level left-forelimb preference’.
In English this means kangaroos basically use their left paws in preference to their right ones for basic tasks.
Go here for a bit more background and a link to the paper in question.
mgpcpastor's blog 
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