An ancient civilization from a distant star could have created immortal machines to roam the Milky Way and keep its legacy alive

By Avi Loeb on September 11, 2021

By now I have reached an age at which my birthdays can be thought of as a countdown to the inescapable end.

We live our life without knowing when that end will come. But acknowledging its inevitability encourages us to build monuments of our accomplishments that will outlast us.

Of course, our DNA can give us that sort of longevity through our children. But we often wish to add meaning to the world we leave behind that goes beyond our genetic code.

Source: Looking for Interstellar Monuments – Scientific American