Because there is no air in space.
Well, in space their is no air, so we obviously air is the number on thing humans would need in space.
Many exobiologists believe it is likely there is life off the earth, however, none has so far been detected. There has been, and is, life off the Earth. Humans and other organisms delivered into space and nearby celestial objects by space craft.
Humans ARE animals. All animals breath oxygen, so all animals would be in trouble in space (unprotected).
You are perceptive in your question; we do all live in space, because we live on a planet in space.
there is a low amount of oxygen, steep cliffs, and you could catch a cold or another sickness or disease
Life in the So-Called Space Age was created on 1998-03-24.
Humans sleep just about there whole life away. So while your awake make the best of it.
So that scientists could investigate the biological effects of space travel without risking the lives of humans.
A dog was sent to space to study the effects of space travel on living organisms, helping scientists understand how astronauts might fare during space missions. Laika, the first dog in space, was used to test the safety and feasibility of sending humans into space.
If you mean animal life than so you can eat them, and if you mean us humans than if there where no humans the earth would be boring.
No, so far we have found no life in outer space. Life may well exist in outer space, but we haven't found it yet.
In the Disney/Pixar movie "Wall-E," the humans are living in a large space ship in outer space. Something happened to the planet earth that made it unable to support life. So when Eve and Wall-E find the little plant growing in the ground, this is the sign the humans were waiting for-- the sign that means the earth is once again able to support life. It means the humans can come home.