Full Episodes

Upcoming Airdates

Transplanting Hope

Follow the patients who desperately need transplants to save their lives, see the profound decisions families face in donating the organs of loved ones who die, and learn about the critical shortage of organs and new research into "organs by design."

  • 2020-03-29T15:00:00-07:00
    KCET-HD
  • 2020-03-29T18:00:00-07:00
    KCET-HD

Bigger Than T. rex

Almost a century ago, paleontologists found the first tantalizing hints of a monster even bigger than Tyrannosaurus Rex, perhaps the largest predator ever to walk the Earth: spectacular fossil bones from a dinosaur dubbed Spinosaurus. But the fossils were completely destroyed during a World War II Allied bombing raid, leaving only drawings, lots of questions, and a mystery: What was Spinosaurus? Now, the discovery of new bones in a Moroccan cliff face is reopening the investigation into this epic beast. What did it feed on and how? Why did it grow so big?

  • 2020-03-30T07:00:00-07:00
    KCET-HD

Day The Dinosaurs Died

Investigate how an asteroid vanquished the dinosaurs 66 million years ago. Join scientists as they drill into the impact crater and, for the first time, reconstruct the hell on earth that unfolded in the minutes, hours and months after the impact.

  • 2020-03-31T07:00:00-07:00
    KCET-HD

Rise of the Mammals

Sixty-six million years ago, an asteroid wiped out the dinosaurs in a fiery global catastrophe. An amazing new trove of fossils reveals how mammals took over, ultimately evolving into the huge array of species, including us, that rule Earth today.

  • 2020-04-01T07:00:00-07:00
    KCET-HD

Why Sharks Attack

In recent years, an unusual spate of deadly shark attacks has gripped Australia, resulting in five deaths in 10 months. At the same time, great white sharks have begun appearing in growing numbers off the beaches of Cape Cod, Massachusetts, not far from the waters where Steven Spielberg filmed the ultimate shark fright film, Jaws. What's behind the mysterious arrival of this apex predator in an area where they've rarely been seen for hundreds of years? Are deadly encounters with tourists inevitable?

  • 2020-04-02T07:00:00-07:00
    KCET-HD

Wild Ways

From Yellowstone to the Yukon, to Southern Africa's elephant highways stretching across five nations, explore how newly established wildlife corridors may offer a glimmer of hope to some of our planet's most cherished - but endangered - species.

  • 2020-04-03T07:00:00-07:00
    KCET-HD

Cuba's Cancer Hope

When the U.S. trade embargo left Cuba isolated from medical resources, Cuban scientists developed their own biotech industry - and promising lung cancer vaccines. Can they now team up with U.S. partners to make the treatments available to all?

  • 2020-04-05T15:00:00-07:00
    KCET-HD
  • 2020-04-05T18:00:00-07:00
    KCET-HD

The Truth About Fat

Scientists are coming to understand fat as a system akin to an organ -- one whose size may have more to do with biological processes than personal choices. Explore the mysteries of fat and its role in hormone production, hunger and even pregnancy.

  • 2020-04-12T15:00:00-07:00
    KCET-HD
  • 2020-04-12T18:00:00-07:00
    KCET-HD
  • 2020-04-13T07:00:00-07:00
    KCET-HD