Did Another Civilization Rule Earth Before Humans?

The Earth is a dynamic planet, home to over 8 billion people today, with tens of millions born and dying each year. Our existence leaves traces in the air, water, soil, and even space, but these signs are fleeting. Buildings, monuments, and even the remnants of catastrophic events like nuclear fallout will eventually fade into oblivion. This raises a question: if an advanced civilization existed millions of years ago, would we even know? The Silurian Hypothesis, proposed by scientists Adam Frank and Gavin Schmidt, tackles this question, suggesting that detecting such civilizations is far more complex than we might assume….