[ClearCase_guy]

Feathers may have evolved early but then were replaced by scales in some creatures because they were not needed.

Humans may evolve organs that allow us to breathe liquid gold. But these organs may eventually disappear from the human race, because they are not needed.

Is that how evolution works?

[trashcanbred]

No.

[Rightwing Conspiratr1]

Humans may evolve organs that allow us to breathe liquid gold. But these organs may eventually disappear from the human race, because they are not needed.

Is that how evolution works?

Pretty much. ET is just a bunch of goofballs sitting around telling each other stories. They get grants to do it.