Why is our planet earth the only planet to support life?
- RichardLv 65 months agoFavourite answer
"that we know of".
- 5 months ago
We don't know it's the only one; but, it's the only one we're aware of so far. It's capable of life because of the resources we have, and our position from the star we orbit. While other worlds may harbor more exotic types of life in what we would consider harsher environments - so far, we've not discovered any... but, we've only just begun to look.
- CliveLv 75 months ago
Who says it is? There could be others, for all anyone knows. We just don't know about them because of the huge distance.
In our own solar system, yes the Earth is the only one that clearly has lots of life on it, and that is for a number of reasons;
- it's the right temperature for liquid water, and that's probably necessary for life
- it has an unusually big satellite called the Moon which keeps it stable - without that it would wobble around more and have too much variation of temperature for life to survive
- it has a magnetic field, which protects us from cosmic rays and ensures there aren't too many mutations
- it's big enough to hold on to an atmosphere.
That narrows it down quite a lot if we're looking for other planets that could have life, but it's a big universe so that doesn't necessarily narrow it down to none except us.
- Ronald 7Lv 75 months ago
Because Absence of Proof is not Proof of Absence
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- Tom SLv 75 months ago
That is quite an assumption, there. Have you really checked every place in the universe to come to that conclusion?
- JosephLv 75 months ago
Because our pool of planets that we know can support life is currently rather limited.
- Campbell HaydenLv 75 months ago
Earth is the only planet
that supports life "that we currently know of".
- Anonymous5 months ago
We don't know it's the only planet. We just haven't found life on the other bodies we've visited.
- Kid MohawkLv 65 months ago
It's the only one that we know of because our ability to explore beyond our own planet is insanely limited. We now understand that it is insanely likely that life exists outside of our planet, but what shape that life will take may disappoint a great number of people. After all, everyone's expecting little green men, but in reality the first aliens we encounter may be little more than single-celled organisms.
- Anonymous5 months ago
It isn’t. Fossilized bacteria was discovered on mars.