Latest / Stuff You Should Know

The Silurian Hypothesis
The idea that we aren’t the first advanced civilization to live on Earth sounds like a fringe theory, but it raises a good question: How can we be so sure that a civilization didn’t arise and die on Earth so long ago that any trace of it has been erased?
See omnystudio.com/listener for privacy information.
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.