Were you looking for a bird or a plane?The Kryptonians are a critically endangered humanoid species from the now destroyed planet Krypton. Superman and Supergirl are the last of the Kryptonians. They are the natural enemies of the Dheronian species as every 20 years they were at war for each other's treasures. Kryptonians are anatomically indistinguishable from humans apart from a slightly greater height and musclulature (this can be explained as an extreme example of convergent evolution). The