Breaking down walls

Build­ing walls is some­thing that we humans do well. The Berlin Wall has since long become his­to­ry now, but else­where in the world walls are still dai­ly used to sep­a­rate peo­ple from each oth­er. The wall along the West Bank in Israel is per­haps the most famous exam­ple. This bar­ri­er is intend­ed to pro­tect Israelis …