No matter how often you ask, the only honest answer is that nobody has found ANY alien races so far, so nobody really knows anything about them for sure.
We only know of one sentient species, homo sapiens. One example is an insufficient basis upon which to generalize about how many arm sentient species might have. So the question cannot be answered at present
We only know of one sentient species, homo sapiens. One example is an insufficient basis upon which to generalize about how many mouths sentient species might have. So the question cannot be answered at present
We only know of one sentient species, homo sapiens. One example is an insufficient basis upon which to generalize about how many ears sentient species might have. So the question cannot be answered at present.
We do not know. We have not made contact with any aliens.
We only know of one sentient species, homo sapiens. One example is an insufficient basis upon which to generalize about how many fingers sentient species might have. So the question cannot be answered at present. However, it seems that a single finger on a hand would not be very useful for manipulating objects and so would limit the development of such a species.
Yes. It might be possible that there are countless sentient species in the universe, but we do not know for now.
Yes. All sentient species do have unusual features. But for now, it is unknown.
Yes. Sentient species come in all shapes, sizes and colors.
Yes. Non-sentient species come in all shapes, sizes and colors.
Yes. Semi-sentient species come in all shapes, sizes and colors.
It is impossible to definitively determine the number of sentient species in the Andromeda galaxy as it is not yet fully explored. However, it is believed that there are a diverse range of civilizations, cultures, and species within the galaxy.
Despite much debate among people and scientist, there is no official proof that there are countless semi-sentient species in the universe.