A fringe conspiracy about reptilian elites leads into the Silurian hypothesis, which asks whether an ancient advanced civilization could have existed without leaving detectable traces.

The Silurian hypothesis asks whether it might be possible to find evidence of a pre-human industrial civilization in Earth’s geologic record—even one that might have existed millions of years ago. The ...

Imagine looking back through Earth's incredibly vast history. We picture dinosaurs roaming lush landscapes, ancient oceans teeming with primitive life, and eventually, the rise of mammals leading to ...

Earth is completely overrun with humans -- there are billions of us living and dying on this planet, leaving signs of our existence in the soil, atmosphere, and even in space. Are we the first, though ...