which planet (besides earth) they expected humen, animals and plants can b lived in?
403307
Not Mars and DEFINITELY not Venus. Mars is too cold and has almost no oxygen. Venus it WAY WAY too hot, hot enough to melt lead, even hotter than Mercury due to a runaway greenhouse effect, and also has almost no oxygen. There is no planet that we know of (yet) that can support plant or animal life like we have on Earth. Maybe one will be discovered in another star system some time in the future, but there is no such planet in our own solar system, other than Earth.
1032657
Earth is special because it has water. Human life, or any other kind of life, is heavily dependent on water. If a planet has water than the chances are high that it will have life.
238707
Venus, Uranus and Pluto\n\nI agree with the answer above about Uranus.
1008297
Another planet, I would like to stand on the moon/mars , look at the earth, and think about how petty the issues we are currently agonizing about,  it's not like that I don't care hunger in Africa or AIDS, I just like to imagine how small our tiny little planet is, and those so called "important' issues are actually not worth a penny if you look at it through the perspective of a man living in the universe instead of planet earth.
948247
NO\nimagine, if we went to some other planet and find intelligent life (intelligent as people), what would we do? \nfirst we would destroy them if we can, but if we cant then we would run away. \ndo we tolerate other people? wars and everything? we can't stand each other, we can't stand some other animal, we kill everything. specially if we are smarter. do we ask rats haw they feel, we just kill them because we don't like them and we don't understand them, and we don't want to understand. we don't share with others!\nI believe there is life in space, but I don't believe that they knew about us, or if they do I don't think that they want to live in peace.\nI think that they are exactly like us!\nhey, but that is just me!
628242
Plants.\n\nThey breathe in CO2 and breathe out Oxygen
451443
Land.\nWater.\nOxygen.\nOther Animals which we get only w/\nPlants which we get only w/\nCarbon dioxide\n\nsimple. there are more feats. about the climate and position and blah blah blah but thats not exactly physical.
141516
The only planet we know of that has life is earth. Based on that very limited knowledge we can only estimate that earthlike life forms would have had great difficulty evolving in the worlds, in and out of the solarsystem, that we know of today (new planets are discovered almost daily). It is probably possible for terrestrial organisms to survive and maybe even prosper if introduced to some shielded and protected water rich enironments on the other worlds described above but there is a great difference between merely surviving and evolving. Life requires very special environments and conditions for a very long period of time, hundreds of millions of years, to evolve. We cant say for sure that those conditions were ever present on any world other than earth. But once life is born on a world it is extremely hard to extinguish completely as it would constantly evolve to adapt to changing environments. Life has nearly ended on earth many times as environments changed but has always bounced back. So if there was life on any other world in our solarsystem it would be so plentiful by now that we would have found traces of it in their atmospheres or in their soils. But we havent.
700706
Things that make it possible to live on earth include oxygen,O2,(respiration) sunlight for plants to do photosynthesis, enough heat , not too much, water, H2O, plants to keep the oxygen cycle going and make food, land to be on, gravity to hold the atmosphere, the rest of the minerals and etc. we need supplied.
327734
I don't know about experiments and alien visits. But I know that I'd like to think that there is more out there some where. I don't even know if there is a chance that other intelegent life exists for not but I can't help but think that other planets in the universe have to be suitable for some form of life and continue to sustain something. We may never find it or know about it, especailly in this life time but there has to be more than just Earth.
1059979
MVEMJSUNP\nMercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.\nMy Very Elegent Mother Just Sat Upon Nine Porcupines\n(like Nine planets)
1112620
Earth.  But one of them is not a true moon.  It's only a temporary one.
490970
The Planet in which we all live on.
562523
heliophobe?\n\n(Plants probably don't belong to this catagory because they need sunlight for food.)
119074
environment is the conditions or surroundings whithin which some one or something lives or exists.
280316
I envisioned a long journey to the Andromeda galaxy and live on the planet Beltran.  The planet was 'constructed' for humans by the native life forms of the Andromedan Federation so we would have a place to live and we could study each other cultures, and final live at peace.
570420
Well, the bible doesn't say anything about life on other planets.  It doesn't say that there isn't life on other planets - it just doesn't give us any directive about what that life is like or what our relation to it would be.\n\nThe bible is silent on the topic.\n\nInterestingly, C.S. Lewis, a famous Christian author, once wrote a science fiction trilogy about life on other planets.  The books in the series are:  Out of the Silent Planet, Perelandra, and That Hideous Strength\n\nC.S. Lewis is my favorite author and that was a great series as I am also a huge Sci-fi fan!