Yes. There are estimated to be at least 100 billion planets in our galaxy alone, some of which seem to be similar to Earth. Given those numbers it seems pretty likely that life would have emerged on planets or moons aside from Earth.
There is no proof that aliens exist. I believe there is no such thing as aliens. Has anyone seen an alien ship? Has anyone seen an alien? No.
If aliens exist, some alien races could possibly have six horns.
If aliens exist, some alien races could possibly have equine characteristics.
If aliens exist, some alien races could possibly have ursine characteristics.
If aliens exist, some alien races could possibly have caprine characteristics.
If aliens exist, some alien races could possibly have porcine characteristics.
aliens eats cookies =] how would /\ you know? r u 1? ummm stars, galaxies, possibly aliens, zodiac signs, star patterns
If aliens exist, some alien races could possibly have erinaceine and hystricine characteristics, such as porcupine and hedgehogs.
Nothing. There are no aliens known to exist.
Aliens are not known and proven to even exist.
If space aliens do indeed exist, they exist for the same reasons we exist. Whatver those reasons may be.
If aliens exist, some alien races could possibly have rodent characteristics, such as squirrels, etc.