Does nature have any rules that are absolute?
Birth
Was I really nothing before I was born?
I know life comes from life. I know my components existed on the planet before I was assembled.
The odds of me being alive are highly improbable, yet, here I am.
If life on this planet was started by a god, then what started his life?
Time
Will time travel ever be possible?
Would you actually have to reverse the actions of everything in the entire universe to travel back into time.
From our current perspective in life, the past had to happen exactly the way it did. There is nothing random about it.
Did we ever actually have any choices?
Can we prove the future exists?
Is time being replayed right now? How would we know?
Are we stuck with all that we have done?
A million years from now, what will become of the 30 trillion life forms that make up my body?
Consciousness
Do rocks have consciousness? Does the universe? Does a self replicating molecule? Do we?
What is the purpose of life and why is it so persistant?
Exactly, why are people better than any other life form on this planet? I hope its not because we can kill everything else.
Humanity
We've only been here a short time. The hard part of creating our species has been accomplished by nature.
Will our species become extinct to another species?
Will mankind destroy itself?
Will mankind every conquer the effects of aging?
Will mankind ever increase its lifespan to a million years?
Will it be possible someday to transfer the information in our brains?