mars's environment

Russian test landing on Mars
An experimental Russian astronaut landed on Mars, after spending a long time in space.
Earth bacteria travel to Mars
US researchers said that when the Curiosity autonomous machine from the US Aerospace Agency (NASA) was put on Mars in August 2012, it was carrying many kinds of Earth bacteria to
Humans can survive on Mars
The American Curiosity autonomous device recognizes that radiation on Mars is equivalent to the radiation on low Earth's orbit so humans can function normally on the red planet.