Researchers have recently uncovered a series of artifacts that suggest the existence of pre-human engineers, challenging our understanding of early human evolution. These findings, dispersed globally, ...

What if we aren't the first technological civilization on Earth? We’re almost certainly the first technological civilization on Earth. But what if we’re not? We are. Although how sure are we, really?

(via PBS Space Time) We’re almost certainly the first technological civilization on Earth. But what if we’re not? We are. Although how sure are we, really? The Silurian hypothesis, which asks whether ...