Wombats literally sh!t bricks – and now boffins reckon they know how

All you need to do this at home is a party balloon and roadkill
The year is 2018 and planet Earth is on the edge. Tensions between the great powers are at boiling point, fires ravage the western United States, and the European Union is in disarray. But yesterday in Atlanta, Georgia, the world's finest minds gathered to answer the question on everyone's lips.…