Russian biologist, Yegor Malashichev is looking beyond humans to explore the mystery of left vs. right-handedness. Human beings were once thought to be the only species with a consistent bias for one “hand” and with 90% of humans favoring the right since the time of the Neanderthals, much of the focus fell to the “unusual” lefties, until now. Creatures with an upright posture (primates and marsupials) have the luxury to favoring one “hand” over another, and while studies on chimps has been inconclusive, Malashichev has discovered that marsupials tend to be left-handed—or rather, left-pawed. For more on nature’s lefties, read more at SimthonianMag.com.