The Effects of Space

In this chapter of Physical Sciences, I will be most excited to learn about the physical and mental effects that space has on the human body. Especially the travel to mars and all of the time spent alone in zero gravity. If astronauts are driven insane by the trip to mars, how are we ever going to get there?And to even further places? Do the space-foods have enough nutrients or variety to keep a full grown man physically stable? Can an astronaut bail out of their spaceship and survive from so many feet up if they have the parachute or another method of slowing the descent? I have no clue.