Heading to Mars is no more a fantasy. Elon Musk has an ambitious plan to build a human colony on the planet and NASA has already put out posters for tourism.

Trouble is, apart from the huge costs, the journey involves zero gravity and long hours of travelling, which can affect the human mind and body adversely. That’s not all. This website even has seven illustrations showing how you can die while travelling to Mars.

Does that mean one of the greatest possible adventures for humans may not be a good idea after all? The video above has some answers.