Because Mars's structure is similar to Earth as there're dried-up riverbeds and the atmosphere has a few oxygen.
yes
No
Well, Mars's conditions is almost like Earth's. Therefore people agree there was (or is) life on Mars. Wither that, or there are LUNATICS who make people gullible enough to believe in aliens ;)
As of today, we are saying that there is no life on mars. But then again [I don't think] humans have actually landed on Mars [the atmosphere would burn you to a crisp], so we can't say for sure. But no definite evidence of life has been found on ANY planet in the Solar System.
So far we have found no sign of any life, Let alone People, on Mars.
No, as of yet there is no evidence of any life existing on Mars but they are still looking.
most people want to discover life
astronauts flew to see what these so called people on mars looked like.
Yes people believe that.
It is not known who vanished life on Mars. There are however proofs that there was once life on Mars.
can life exist on mars
There is about a chnace of people to hold on mars. Science say that there might be a 40 % chance of many people been holding on mars, but thing about it., Think about the mass of Mars and then thing of the mass of Eath. There might be a differnet but saying from everything, there is a chance that it can hold has many peopole as Eath. But 60% there is not a chance. So from out of 100% there will be only 43% people can be holded on mars and 57% not holded.