Was the Solar System Previously Home to Another Intelligence?
When astronomers talk about the search for life elsewhere in our solar system, they usually talk about microbes, simple and resilient forms of life known to exist in the most extreme temperatures and conditions. Space probes have mapped enough of the sun’s planets and moons to show there are no civilizations lurking in this star system, save for the one on Earth. But what if we’re not done looking yet? What if there are indeed signs of an ancient intelligent species right here, on the worlds in our own backyard, waiting to be found?