Aren't humans on any planet other than Earth technically aliens by definition? I mean, if you went to Mars and met a some Martians, they would be native life forms and you would be the alien.

The trope says Goku wasn't supposed to be an alien originally. Does that mean he didn't have a tail, or what was the deal with that?

Can a DC fan confirm if Thanagarians (Hawkgirl) naturally have wings or not? Because if they do the example needs to be removed.

And also is Galactus always a lot larger? Because I think if there's a large size difference, then it doesn't count either