The Best Place to Look for Alien Megastructures Might Be Moon Dust

Our search for technosignatures - clear signs of advanced civilizations beyond Earth - takes many forms. Many are driven by the famous Drake equation, which attempts to estimate how many technological civilizations there are in the Milky Way. However, theres a big fat question mark at the end of that equation in the form of a variable intended to account for the longevity of a civilization. And to be clear, that doesnt mean how long the civilization itself survives. It simply means how long it a...