Astronauts on future missions to Mars may get so bored and lonely they fight among themselves, say Australian psychologists. The researchers are testing their theory on group conflict with a team of scientists heading to a simulated Mars base in the remote Australian outback this August. The scientists will be living and working in Mars-like conditions at an experimental base at Arkaroola, in the Flinders Ranges, 660 kilometres north of Adelaide. The expedition to Arkaroola leaves on 2 August and is organised by the Mars Society, an international group of scientists based in Colorado dedicated to Mars exploration.