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Nova Previous Broadcasts

Secrets of the Sun (Episode #3907H)

KQED 9: Wed, Jul 20, 2016 -- 9:00 PM

It contains 99.9% of all the matter in our solar system and sheds hot plasma at nearly a million miles an hour. The temperature at its core is a staggering 27 million degrees Fahrenheit. It convulses, it blazes, it sings. You know it as the sun. Scientists know it as one of the most amazing physics laboratories in the universe. Now, with the help of new spacecraft and Earth-based telescopes, scientists are seeing the Sun as they never have before and even re-creating what happens at the very center of the Sun in labs here on Earth. Their work will help us understand aspects of the sun that have puzzled scientists for decades. But more critically, it may help us predict and track solar storms that have the power to zap our power grid, shut down telecommunications, and ground global air travel for days, weeks, or even longer. Such storms have happened before-but never in the modern era of satellite communication. Thid episode reveals a bright new dawn in our understanding of our nearest star-one that might help keep our planet from going dark.

Repeat Broadcasts:

  • KQED World: Sun, Jul 24, 2016 -- 3:00 PM
  • KQED 9: Thu, Jul 21, 2016 -- 3:00 AM

Making North America: Human (Episode #4222H)

KQED 9: Wed, Jul 13, 2016 -- 9:00 PM

From Ice Age to oil boom, discover the challenges faced and the wealth uncovered as humans take over the continent. How did we turn rocks into riches? And what catastrophic natural disasters could threaten the civilization we've built?

Repeat Broadcasts:

  • KQED Life: Wed, Jul 20, 2016 -- 2:00 AM
  • KQED Life: Tue, Jul 19, 2016 -- 8:00 PM
  • KQED World: Sun, Jul 17, 2016 -- 3:00 PM
  • KQED World: Fri, Jul 15, 2016 -- 11:00 AM
  • KQED World: Fri, Jul 15, 2016 -- 5:00 AM
  • KQED 9: Thu, Jul 14, 2016 -- 3:00 AM

Making North America: Life (Episode #4221H)

KQED 9: Wed, Jul 6, 2016 -- 9:00 PM

In this episode we unpack the mysteries of how life evolved in North America. From massive volcanic eruptions, that killed three quarters of all species, to the appearance of giant inland seas populated by huge marine dinosaurs, the geology and life of North America have always gone hand in hand. We also reveal the part that geology played in the arrival of humans on the continent, as the appearance of the Panamanian land bridge altered ocean currents, helping bring about the last ice age.

Repeat Broadcasts:

  • KQED Life: Wed, Jul 13, 2016 -- 2:00 AM
  • KQED Life: Tue, Jul 12, 2016 -- 8:00 PM
  • KQED World: Sun, Jul 10, 2016 -- 3:00 PM
  • KQED World: Fri, Jul 8, 2016 -- 11:00 AM
  • KQED World: Fri, Jul 8, 2016 -- 5:00 AM
  • KQED 9: Thu, Jul 7, 2016 -- 3:00 AM

Colosseum - Roman Death Trap (Episode #4206H)

KQED Life: Tue, Jul 5, 2016 -- 10:00 PM

One of the ancient world's most iconic buildings, the Colosseum is a monument to Roman imperial power and cruelty. Its graceful lines and harmonious proportions concealed a highly efficient design and advanced construction methods that made hundreds of arches out of 100, 000 tons of stone. But this building is more than just an architectural giant - in its heyday it was filled with unbelievable spectacles and 50,000 cheering fans. In its elliptical arena, tens of thousands of gladiators, slaves, prisoners, and wild animals met their deaths. Ancient texts report lions and elephants emerging from beneath the floor, as if by magic, to ravage gladiators and people condemned to death. Then, just as quickly, the Colosseum could be flooded with so much water that ships could engage in sea battles to the delight of the crowd. Could these legends be true, or are they just myth?
Now, with extraordinary access to one of the world's most protected world heritage sites, archaeologists and engineers are teaming up to recreate ancient Roman techniques to build a 25-foot lifting machine and trap door system capable of releasing a wolf into the Colosseum's arena for the first time in 1500 years. To do it, they will have to decipher ghost-like impressions left on the crumbling walls of the Colosseum's basement by the original lifts and then transform them into working plans for construction. Do they have what it takes to replicate the innovation and ingenuity of the Romans?

Repeat Broadcasts:

  • KQED Life: Wed, Jul 6, 2016 -- 4:00 AM

Making North America: Origins (Episode #4220)

KQED World: Fri, Jul 1, 2016 -- 5:00 AM

See the epic 3-billion-year story of how our continent came to be. From palm trees that once flourished in Alaska to huge eruptions that nearly tore the Midwest in two, discover how forces of almost unimaginable power gave birth to North America.

Repeat Broadcasts:

  • KQED World: Fri, Jul 1, 2016 -- 11:00 AM
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TV Technical Issues

TV
    TV Technical Issues
    • Mon 6/27: DT9 PSIP issue for Over the Air viewers

      RESOLVED: PSIP was restored at apx 2:50pm Monday. Our signal should be ID’g as 9.1, 9.2 & 9.3 again. – – – – – (DT9.1, 9.2 & 9.3) Our Over the Air (OTA) signal for DT9 is still transmitting. However, we are aware that the PSIP information line in our OTA signal has stopped. Engineers […]

    • Mon 6/13: RESOLVED ? KQED Plus (KQEH) Transmitter Off the Air (DT54.1 through 54.5)

      UPDATE: The signal was restored apx 5pm Monday. Most TVs will have recovered the signal on their own, but some viewers may need to do a rescan in order to re-acquire the signal. – – – – – – – – – – – – Our KQEH transmitter in the San Jose area has suffered […]

    • Mon 5/09/16: KQEH DT54 planned short outages

      (DT54-1 through 54-5) Monday 5/09 The DT54 Over the Air signal will need to switch from main to auxiliary levels at some point Monday (most likely early afternoon) for the safety of the crew working on another station’s equipment on the tower, then back to the main antenna late-afternoon when work is completed. The change […]

To view previous issues and how they were resolved, go to our TV Technical Issues page.

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