>Well apparently their strategy to ensure survival didn't do too well since we're discussing an extinct civilization here. Not necessarily. They could have ex

>Well apparently their strategy to ensure survival didn't do too well since we're discussing an extinct civilization here. Not necessarily. They could have existed hundreds of millions of years ago, and become victims of the Chixhulub asteroid impact or other huge natural disaster after successfully maintaining an advanced civilization for hundreds of thousands of years, FAR longer than our probably ill-fated civilization has managed. They might have also left the planet. Or they could have transcended into energy beings.