Chris Daniels, Professor of Biology at the University of South Australia, tells Ali Clarke about stoned wallabies who were caught making crop circles in Tasmania after getting into the opium poppy paddocks.

Tasmanian poppy farmers were having a difficult time managing their crops because crop circles were damaging the flowers. They discovered that the culprits were wallabies, who were getting under the fences, eating the poppies and getting stoned. And when wallabies get stoned, they hop in circles.