“A man, in his books, may be said to walk the earth a long time after he is gone.” MenMayLongSaidBookEarthScienceWalksGoneLong Time Author:John Muir
“If we're thinking about old civilizations, those that formed a long time ago and there were stars and planets around long before Earth even existed, then these are going to be towards the center of the galaxy. That is the place to look if you think there are ancient civilizations that have made beacons or some other way of attracting our attention.” IfsThinkingWayLooksLongMadeEarthStarsAttentionPlanetsCivilizationLong TimeAncientGalaxyLong Time AgoBeaconsAncient CivilizationsStars And Planets Author:Paul Davies