Originally Posted by accountinquestion View Post
Tableplay -
I'd never heard of the Silurian hypothese. Do the proponents of this believe that it may have happened with the Sun at its (roughly) current stage?
The sun would be a few million years younger, so it would probably be roughly in its current stage (the sun is about 4.6 billion years old) at one of the conjectured windows of non-human advanced civilization. The sun will begin its phase of becoming a red giant in about 6 billion years.