Michael Engelmann, director of the Koethen Zoo, holds up kangaroo joey “Muffin” in Koethen, Germany, 03 March 2016. The ten-week-old Bennett's tree-kangaroo fell from its mother's pouch in mid-February in the Koethen Zoo. Because it can't return, its now growing up in a pillowcase as a replacement for a maternal pouch. (Photo by Sebastian Willnow/EPA)
