Because they belong to Lucifer. We call them the "LUCI's."
Another answer:
Good try, but the real answer is that Homo sapiens sapiens is the most aggressive and cruel predator the Earth has ever seen.
It is important in case there is life beyond Earth.
Given the immense number of planets in the Universe it would be unsupportable to state that "only the Earth" can support human life. In this solar system no other planet has surface conditions which would allow exposed humans to live. This does not preclude humans living in contained communities or in a terraformed environment.
For us humans and our animal companions, it is the only habitable planet known to us at the present time. There is a possibility that there are other planets within the Universe that we could inhabit if we could get to them, but the Universe is massive and we currently know very little about the planets within it.
The planet Saturn.
No, it is not for only humans. It existed long before humans appeared and will exist long after we are gone; in that time, it has, is and will support hundreds of millions of other types of organism.
No, the Earth is the only planet with Humans.
If by humans visiting you mean , Which planet's have had humans land on that planet the answer is none. The only other place in space that humans have visited is the moon.
There is no other planet in the Solar System that can, without assistance, support human life.
Humans have visited NO planet outside of Earth. Humans have visited the Moon, which is not normally considered a planet.Unmanned probes sent by humans, on the other hand, have already visited several planets.
Not unaided. But this is no slight to the dwarfs; humans couldn't live on ANY other planet without substantial life support systems.
Us, Humans. Because we kill any other living thing including other humans
Yes they are ! The human race continues it's 'domination' of this planet at the expense of ALL other species !
Because humans are the smartest animals In the world. Humans are primates included chimpanzees and the other apes.
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.
Earth. Humans have not set foot on any other planet. We have been on the moon, but the moon is not a planet, it is a satellite of earth.
We do not know of any other planet with a sustainable atmosphere that supports human life.
Dogs are not smarter than humans. Our intelligent minds are far greater than that of any other brain in the planet.