Nova

1Season 47

S47.E1 ∙ Polar Extremes

Wed, Feb 5, 2020

Paleontologist Kirk Johnson explores the polar extremes of the planet, including miles-high ice sheets and warm polar forests brimming with life.

2Season 47

S47.E2 ∙ Dog Tales

Wed, Feb 12, 2020

A look at dog domestication, how scientists test wolf intelligence and decode canine DNA, and what science says about a dog's love for humans.

3Season 47

S47.E3 ∙ Cat Tales

Wed, Feb 19, 2020

The perplexing behaviors of cats have often raised the question of whether humans ever really domesticated felines.

4Season 47

S47.E4 ∙ Mysteries of Sleep

Wed, Feb 26, 2020

Scientists study why animals and humans need to sleep, what happens to the brain during sleep, and the role sleep plays in memory, trauma, and emotion regulation.

5Season 47

S47.E5 ∙ Cuba's Cancer Hope

Wed, Apr 1, 2020

When the trade embargo left Cuba isolated from medical resources, Cuba was forced to get creative. Now they've developed lung cancer vaccines that show promise, some Americans are defying the embargo and traveling to Cuba for treatment.

6Season 47

S47.E6 ∙ The Truth About Fat

Wed, Apr 8, 2020

The mysteries of fat and its role in hormone production, hunger and pregnancy.

7Season 47

S47.E7 ∙ Decoding COVID-19

Wed, May 13, 2020

Doctors strategize to stop the spread of COVID-19; researchers work toward finding treatments and vaccines; how the disease emerged, what it does to the human body, and how it became a pandemic.

8Season 47

S47.E8 ∙ Eagle Power

Wed, May 20, 2020

Up-close footage provides a look at the strength, eyesight and flying skills of an eagle, and reveals the danger and drama of chicks as they struggle to survive.

9Season 47

S47.E9 ∙ Human Nature

Wed, Sep 9, 2020

Scientists study the implications of CRISPR (Clustered Regularly Inter-spaced Short Palindromic Repeats: a family of DNA sequences found in the genomes of organisms such as bacteria) and how they may change the human race's relationship with nature and what it means for human evolution.

10Season 47

S47.E10 ∙ The Secret Mind of Slime

Wed, Sep 16, 2020

New research on extremely primitive life forms called slime molds, which navigate through life without a brain, could reveal the fundamental rules underlying all decision making.

11Season 47

S47.E11 ∙ A to Z: The First Alphabet

Wed, Sep 23, 2020

Researchers uncover the evolution of writing and the story of the alphabet, dating back to millennia, old carvings in an Egyptian turquoise mine.

12Season 47

S47.E12 ∙ A to Z: How Writing Changed the World

Wed, Sep 30, 2020

How the development of writing played a vital role in shaping world history, from the invention of paper to the printed book.

13Season 47

S47.E13 ∙ Nature's Fear Factor

Wed, Oct 14, 2020

Scientists reintroduce wild dogs to Mozambique's Gorongosa National Park to see if it helps restore balance to the entire ecosystem.

14Season 47

S47.E14 ∙ Touching the Asteroid

Wed, Oct 21, 2020

Spacecraft OSIRIS-REx attempts to grab a piece of an asteroid to bring back to Earth so scientists can study it to learn about the planet's origins.

15Season 47

S47.E15 ∙ Can We Cool the Planet?

Wed, Oct 28, 2020

As global temperatures rise, scientists look to geoengineering solutions, from planting trees to sucking carbon out of the air, as a means to cool the planet.

16Season 47

S47.E16 ∙ Saving Notre Dame

Wed, Nov 25, 2020

Engineers race to rebuild the roof of the Notre Dame cathedral and secure the medieval structure within five years.