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No Dark Matter = Proof of Dark Matter?

We’ve been failing to detect dark matter for decades. Finally, the latest failure to detect dark matter may have actually proved its existence. One of these is true: either most of the matter in the universe is invisible and formed of something not explained by modern particle physics OR our understanding of gravity is completely broken. Watch this episode from "PBS Space Time."

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Upcoming Airdates

Nova

Why Bridges Collapse

In 2018, Italy's Morandi Bridge collapsed, killing 43 people. NOVA investigates what went wrong and explores other bridge collapses across the United States. How can new engineering techniques make bridges safer and prevent such tragedies?

  • 2019-10-20T15:00:00-07:00
    KCET-HD
  • 2019-10-20T18:00:00-07:00
    KCET-HD

Nova

Look Who's Driving

Tech giants and car manufacturers alike are developing self-driving cars - and some of them are already on public roads. But what must computers be capable of to truly take the wheel? And could they eventually be safer than human drivers?

  • 2019-10-27T15:00:00-07:00
    KCET-HD
  • 2019-10-27T18:00:00-07:00
    KCET-HD

Nova

Secrets of the Sky Tombs

A team of daring scientists reveals ancient secrets of the first people to settle the forbidding Himalayas. Join them as they climb into mountain tombs that preserve evidence of strange rituals designed to ward off the restless spirits of the dead.

  • 2019-11-03T14:00:00-08:00
    KCET-HD
  • 2019-11-03T17:00:00-08:00
    KCET-HD

Nova

Dead Sea Scroll Detectives

What can new technology reveal about the ancient Dead Sea Scrolls? Join scientists as they investigate suspicious, newly surfaced fragments to see if they're forfeited, and use imaging techniques to digitally unravel the charred remains of a scroll.

  • 2019-11-10T14:00:00-08:00
    KCET-HD
  • 2019-11-10T17:00:00-08:00
    KCET-HD