That&#x27;s a good point, I&#x27;d never really thought of that! Almost any life we could find in another system, we&#x27;d see before our first radio waves got to them.<p>On the other hand, if I was some ancient super advanced civilization, I&#x27;d have probes all over the galaxy, and they&#x27;d report as soon as anything interesting happened with evolution on a planet. So they could know what life was like on Earth about 1500 years ago, and extrapolate from that.<p>Not that I can guess what a super advanced civilization would think like :P