[lutusp]

> Our planet needs to create at least one offspring with a good chance of sprouting a fresh batch of DNA based life on another planet before we send ourselves back into the stone age.

I hate to break this to you, but evolution isn't about humans or dolphins or spacefarers, it's about genes -- evolution is genes replicating, using organisms as vessels.

In answer to the old question about which came first, the chicken or the egg, an evolutionary scientist answers, "a chicken is an egg's way to make another egg."

Also, at a more mundane level, by the time our descendants are scattered across all the local star systems, they will be so different from us that we won't recognize them or feel any special kinship.

But on reading your post to the end, I see you're probably kidding. Oh, well.

[sentientmachine]

I believe that all life on this planet came from elsewhere in the universe. And only the life forms that can quickly reproduce and spread to other planets get to live on. Our meta species has not yet reached the time where we explode and spread our genetic material all over like a dandelion in the wind. Intelligent life on this planet is still inside the proverbial egg, and we are maybe 300 years from hatching.

[lutusp]

> I believe that all life on this planet came from elsewhere in the universe.

One can argue that this is uncontroversial on the ground that life's precursors came from elsewhere. The only debate is what level of complexity is meant by "came from elsewhere".

> And only the life forms that can quickly reproduce and spread to other planets get to live on.

There's another, more likely explanation -- that life in some form naturally arises if the conditions are right, and there doesn't need to be a connection with another life-supporting environment. This isn't proven yet, it's just likely.