MrLucky wrote:
auntblabby wrote:
I betcha by the time any future earth civilization starts getting it right, the sun will nova. too late for earth. some other planet will have to be the test bed, humanity had multiple, abundant chances and still blew it.
I do have a theory where once civilizations reach the atomic age, we are in a race for survival, meaning that we must learn how to colonize and spread ourselves out to other worlds somehow or at some point we will be knocked down again and again. Robert A. Heinlein did say that the Human race should not have all its eggs in one basket. However for some reason, if we don't do ourselves in by doing something stupid, something natural will come and set us back.
Again, science fiction. We aren't even sure if our solar system is in a "bubble" or not-- basically we don't know if our solar system is "normal" or if it's an anomaly. There's also no guarantee we'll ever be able to engineer a craft that can leave the heliosheath into the interstellar medium intact, let alone enter another star's heliosheath. Sure don't put all the eggs in one basket, but also don't think that one of the baskets will magically develop a cocoon to protect the egg from all the problems the other baskets have to deal with. For all intensive purposes our reach is Earth, but we can piss on the moon, s**t on mars, and perhaps fart on Europa someday soon...but our actual reach is still just Earth.