This ancient catastrophe killed 90% of all species on Earth. But an asteroid wasn't to blame... Here's how the disaster unfolded: | NOVA l PBS

Watch archeologists uncover the tomb of a Pompeiian priest, perhaps the most well-preserved body in the ancient city: | NOVA l PBS

In a vast labyrinth of quarry tunnels hidden under Paris, scientists explore the catacombs in order to repair Notre Dame's stone vaulting: | NOVA l PBS

This 1969 Chevy Nova is probably worth $400,000 — here’s why