As for as is known no earthlings have ever been on Mars.
Humans have not technically visited any planet. We have sent landing craft to Mars and Venus though. Those missions were in exploration of possible future human habitats, but neither planet is suited for human survival.
No human has really visited any planet other than Earth; the Moon isn't a planet. However, spacecraft have visited other planets, such as the Spirit and Opportunity rovers, who went to Mars
So far we have found no sign of any life, Let alone People, on Mars.
yes
Some people have been to Mars and Venus.
yes
It is a rocky planet or terrestrial planet. Any planet before Mars is terrestrial and any planet after Mars is a gas giant.
yes
No one knows what is on Mars, if you mean any life; but Mars is a very dusty and red colored planet
The gravity on Mars or any other planet pulls you toward the planet's center.
The only planet astronauts have visited is earth. The moon, a satellite, has also been visited.
No. Astronauts have not visited any planet outside of the earth.The only other body in the universe besides earth that humans have ever stood on is the moon,and that hasn't happened in the last 32 years.