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Mars
Titan is like early earth.
In this galaxy, only Earth for humans. Mars may once have had life, but it is not habitable to humans. Astronomers and scientists have found planets somewhat similar to Earth, but they may not have all the conditions necessary for humans. We still know very little about these planets.
none. life outside earth has yet to be found.
Earth is similar to Mars because we know that life is possible on earth and some scientists believe that life is also possible in mars because it has some things which is also present in Earth and is needed for all living things.
Life has been found just about anywhere on Earth.
So far - Earth
It used to be. Scientists have found frozen water on Mars.
So far Earth. They do have robots on Mars so they could be evidence.
So far, scientists haven't found solid proof of any form of life outside of Earth. However, scientists have found signs of life on Mars, and some believe that bacterial life exists there. However, we still are more than 80% sure that there is no life on Mars.
They have studied and researched our solar system and found no extraterrestrial life beyond the Earth.
Earth is the only planet known to have life on it, however with the vastness of space the likelihood of life not existing anywhere else is astronomically low. We just havent found it yet.
The biosphere is where all ecosystems exist.The amazing thing is that scientists have found life even in sulfur pools and in the deepest oceans, in deserts etc.
Life it ubiquitous on and in the Earth. Earth has been terraformed by the biosphere.
Scientists study the characteristics that make life on earth possible so they can figure out when life will know longer be possible. They also want to know what causes life to not be possible.
Bacteria are usually considered as one of the pioneering generations of life on earth by the scientists.
No.No.No.No.