Hi.
We don't know for sure that any other planet has life. Scientists are
especially interested in Mars, though. That is a big reason why they
are searching so hard for liquid water there - liquid water might mean
life and it does seem like Mars may have had liquid water at some time
in the past at least. There is also some interest in Jupiter's
moon Europa, which it thought to have a slushy water ocean beneath its
icy surface.
Of course, there may be planets with life on other solar systems. We
are not able to observe planets in other solar systems, especially the
small, earth sized ones, well enough to tell at this point,
Terry
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