Aliens waiting to hear about Salvation?

In light of last week's topic, All Other Creatures, which tells us as believers to preach the word of God to all other creatures, meaning anything God made, I am now addressing the issue of whether or not there might be aliens on other worlds or even beings on our own planet who need to hear the about salvation.

Granted, the argument has been given that humans alone were created. After all, it says in Genesis we were made in God's image. Yet, what is God really? He is love. He is spirit. Two things easily transformed into other beings or shapes or creations.

Yes, Jesus is the only begotten son. But who is to say that God did not make other beings elsewhere who, even now, wait to hear the good news that will be brought by us, when or if, we ever manage to leave our cradle and launch out into the stars.

I didn't think it a crazy idea. In fact, in my book God's Gift, which is on my publisher's 'to do' list and will be released sometime in the near future, addresses this very question. 

All Other Creatures

Romans 8: 39 KJV Nor height, or depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

Mark 16: 15 KJV And he said unto them, Go ye into all the world, and preach the gospel to every creature.

Hebrews 4:13 KJV Neither is there any creature that is not manifest in his sight: but all things are naked and opened unto the eyes of him with whom we have to do.

These three verses are examples of an odd word - creature. What exactly does this mean? The Greek word is ktisis. It means: A making, thing made, formation, (literal or figurative) building, creation, creature, ordinance.

So what is God saying here when the word creature is used?

In Romans in the previous verses, it talks of what can't separate us from God. Literally it says devils spirits, those in power over us, life, death, angels, present nor future, and yet it specifically also adds creatures. What other creatures is Paul writing about that God felt was so important we, as believers, needed to know that?

In Mark, Jesus is telling his followers to preach the word of God to all Creatures.

In Hebrews God sees all creatures.

So what other creations has God made that we are supposed not to be afraid of and preach His word to?

An interesting mystery. Any thoughts?