Kangaroos and other macropod marsupials display left-hand preference at the population level for everyday tasks in the wild, says a team of scientists including Janeane Ingram from the University of Tasmania, Australia. This result challenges the notion that in mammals the emergence of ‘true’ handedness is a unique feature of primate evolution. A red-necked wallaby (Macropus rufogriseus) manipulating food with one hand. Image credit: Andrey Giljov...