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Mars offers suitable gravity and raw materials for a colony. Mercury and Venus are too hot and the gas giants don't have livable surfaces or gravity. (Some of their moons may.)

The temperature on Mars during the summer is about 20° C to -40°C which suggests a survivable climate. In fact, at one time in the past Mars was much more hospitable to Earth-type life. There is likely a lot of water ice at the poles. And unlike asteroids and moons, there is room for lots of development.

Considering all the above points, one can say that a protective habitat is possible on Mars, but obviously one cannot live on Mars as easily as we do on Earth. The atmosphere is normally too thin to breathe and the pressure so low that blood would boil at body temperatures.

Colonies on the Moon and Mercury would essentially be in a vacuum, although like Mars there is likely a considerable amount of water ice (in deep craters on both bodies). also mars OS way to hot any other time apart from summer so it is a problem.

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Q: Why is Mars the only planet humans can survive on?
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Why can humans only live on Earth?

It is the only planet with the recourses necessary for us to survive.

Which planet likely will be visited by humans in the future?

the planet Mars is the only planet that can be visited by humans in the future and besides Venus is slightly closer but it is tremendously more inhospitable. And all the other planets are much farther away.

What are some of the earths characteristics?

One of the characteristics are that it is the only planet that humans can survive on.

Is the moon the only planet that humans have been on?

Yes, apart from earth. (Technically the moon is not an actual planet, so technically the only planet humans have been on is Earth). There is talk of sending a manned mission to mars, though it seems unlikely.

Is Mars a weird planet?

Mars is not a wierd planet only its source.

What planets can humans survive on?

Earth. Only earth so far, maybe mars if there was water and enough oxygen

Could humans breathe on any other planet?

Venus and Mars are the only other solid bodies in the solar system with atmospheres dense enough to "breathe", but neither contains nearly enough oxygen for a human to survive on.

Does one planet Mars exists?

Yes, only one planet Mars exists.

What transportation on Mars?

There is no lif on the planet Mars. Only Earth is a life-filled planet. -shomama. :)

Is mars a large and gaseous planet?

No, Mars is only about half the size of Earth and it is a solid, rocky planet.

Why humans prefer to live on a rocky planet?

This isn't a rocky planet-Mars, Venus and Mercury are rocky planets. This planet can only really be described as a watery planet. We aren't really given the choice of which planet we live on, this is the only one so far that can support 'advanced' life.

What is the driest planet?

Earth is the wettest known planet. It is the only planet known to have liquid water. The only other planet with any form of water is Mars with ice on one of the poles.