Could We Be Aliens?
Life originated somewhere. It is most unlikely that, in all the billions of planets in billions of solar systems, in billions of galaxies . . . . . . that it originated here. So, in that respect, all life is alien to this planet. However, from 3 or 4 billion years ago, it may well be assumed that we qualify for naturalisation ("
Most British naturalisation applications take between 3-4 months to be processed".)
Life clearly originated "naturally". If it required a predecessor, then who/what pre-dated the predecessor?
Life from alpha-Centauri? . . . . . . . . . Reductio ad absurdum. So, by now, we are probably naturalised citizens of planet Earth, even though, directly or indirectly, we had alien origins. Alien, in this context. simply means
somewhere else.
Cat