A message may take as long as 40 minutes to travel to Earth and back , and there may be times when communication with the ground is not possible at all . The Mars Society wants to send a man and woman to Mars . Handling stress well and getting along with other people is important , experts say . Middle - aged men were stable in research conducted in Antarctica .
The Mars Society wants to send a man and woman to Mars . Handling stress well and getting along with other people is important , experts say . Middle - aged men were stable in research conducted in Antarctica .