The air pressure on the planet Mars is extremely low. A person exposed to such low air pressure would therefore be injured by the internal pressure of his or her own body, which is adapted to the Earth's atmosphere. Even aside from that, the atmosphere of Mars does not contain oxygen, so any person trying to breathe it would die from lack of oxygen. However, a person could live on Mars, just as a person could live on the moon, as long as that person remained inside a space suit or other air-tight container, which would provide the right kind of air pressure and oxygen to breathe.
they would swell upn and die
No, humans have not traveled to Mars yet. Only robotic spacecraft have been sent to explore Mars, such as the Mars rovers and orbiters. The first crewed mission to Mars is currently planned for the mid-2030s by NASA.
Yes, human-made objects have traveled to Mars. NASA has successfully deployed several robotic missions on Mars, including the Mars rovers like Sojourner, Spirit, Opportunity, Curiosity, and the lander InSight. However, humans have not physically traveled to Mars yet.
The moon is the farthest a man has traveled. Mars is planned for 2018.
No, only land rovers have traveled to Mars. Humans do not yet have a sophisticated enough space craft, and it would be so far impossible to hold enough supplies for the trip back and forth.
Man-made objects have traveled to Mars, zoomed by Mars and kept going, crashed on Mars, entered orbit around Mars, and landed on Mars. At least three of them are presently creeping around on the surface of Mars under the command and control of their own on-board software and controllers on Earth, performing scientific experiments and observations, and communicating their findings back to Earth. The only astronomical body other than Earth around which humans have entered orbit or upon which humans have walked is the moon ... roughly 1/2 of 1 percent of the distance from here to Mars.
they would die
*mars odyssey *mars global surveyor *mars pathfinder
Water
No, humans have not traveled to Mars. There have been robotic missions to Mars, such as the Mars rovers, but no humans have set foot on the planet yet. Plans for crewed missions to Mars are being developed by space agencies and private companies for the future.
the moon
Well it has no oxygen but it has frozen water so if life existed on mars they would not be humans.