No astronaut has ever been to Mars.
Sally Ride never went to Mars. Nobody has. Sally Ride was an astronaut on the Space Shuttle, which is designed for low Earth orbit.
At the poles of Mars.
no
Mars> slim to none Earth> 9.67% Reason: No astronaut can make it to Mars
On Mars the astronaut could hike for thousands of miles and explore incredible canyons and mountains, so he may not be as bored as he would become in a cave. On Mars the astronaut could use solar panels to power all of his equipment for the entire year. On Mars, the communication would be wireless. On Mars there would be sunsets and sunrises and beautiful stars to look at. So the cave experiment ( done several times already ) would not prove how long an astronaut could survive on Mars. On Mars, an astronaut could have robots to help him do things. He could possibly travel by bicycle or on a small electric motorbike. He could probably even explore caves.
Robinson Crusue on Mars..
no astronaut was ever sent to mars
their have planned it that they their by 2037
Mission to land on Mars
How We Went to Mars was created in 1938.
No one went to Mars. It was an unmanned robotic expedition.