Nova

1Season 49

S49.E1 ∙ Arctic Sinkholes

Wed, Feb 2, 2022

Long-frozen permafrost is melting. How does the resulting release of methane affect us now and what will be the future effects?

2Season 49

S49.E2 ∙ Secrets in the Scat

Wed, Feb 9, 2022

Scott Burnett is "Scatman"- an Australian ecologist on the trail of the secrets of poop. By identifying and analyzing animal scat for DNA and hormones, he discovers essential details of their behavior and how to protect them.

3Season 49

S49.E3 ∙ Great Mammoth Mystery

Wed, Feb 16, 2022

A unique site in southern England preserved rare traces of ancient ice age mammoths and Neanderthals; host David Attenborough.

4Season 49

S49.E4 ∙ Augmented

Wed, Feb 23, 2022

An inventor of bionic limbs, Hugh Herr, works with an injured climber and a surgeon to test a new amputation technique that allows prosthetic limbs to move and feel like the real thing.

5Season 49

S49.E5 ∙ Determined: Fighting Alzheimer's

Wed, Apr 6, 2022

Three women enroll in trials at the University of Wisconsin in hopes of finding a cure for Alzheimer's disease.

6Season 49

S49.E6 ∙ Dinosaur Apocalypse: The New Evidence

Wed, May 11, 2022

In North Dakota, scientists use new fossils to reconstruct what life might have been like just before an asteroid wiped out the dinosaurs. The site reveals evidence, including the unhatched egg of a pterosaur, a huge flying reptile.

7Season 49

S49.E7 ∙ Dinosaur Apocalypse: The Last Day

Wed, May 11, 2022

Sir David Attenborough explores fossils from a North Dakota site that could reveal what happened to the animals here the day an asteroid struck Earth and wiped out the dinosaurs.

8Season 49

S49.E8 ∙ Why Ships Crash

Tue, Jan 18, 2022

When the Ever Given blocked the Suez Canal, it triggered a global crisis. Using eye-witnesses speaking for the first time, This investigation aims to find out what really happened.

9Season 49

S49.E9 ∙ Ice Age Footprints

Wed, May 25, 2022

A look at what thousands of prehistoric footprints in New Mexico's White Sands National Park might reveal about the peopling of the Americas.

10Season 49

S49.E10 ∙ Ultimate Space Telescope

Wed, Jul 13, 2022

NASA's James Webb Space Telescope, from its conception to completion.

11Season 49

S49.E11 ∙ Saving Venice

Wed, Sep 28, 2022

Water is the lifeblood of Venice, but it also threatens its foundations. During the pandemic, experts and inhabitants were able to combine their know-how to repair their city and prepare it for the next floods.

12Season 49

S49.E12 ∙ Ending HIV in America

Wed, Oct 5, 2022

Explores the scientific progress that has been made in the fight against HIV, highlights the activism and commitment of communities that are still hard hit by the virus, and reveals how close we may be to the ending of HIV in America.

13Season 49

S49.E13 ∙ Computers v. Crime

Wed, Oct 12, 2022

The hidden biases, privacy risks and design flaws of the artificial intelligence programs relied on by police departments and the courts.

14Season 49

S49.E14 ∙ Can Psychedelics Cure?

Wed, Oct 19, 2022

Scientists discover that psychedelics can have positive clinical impacts, helping patients with afflictions ranging from addiction to depression to PTSD.

15Season 49

S49.E15 ∙ Ocean Invaders

Wed, Oct 26, 2022

In the Atlantic, the lionfish is an invasive species with no predator to keep it in check. Another invasive species, the Asian giant hornet is featured.

16Season 49

S49.E16 ∙ Nazca Desert Mystery

Wed, Nov 2, 2022

Discoveries of long-hidden lines and figures etched into the Peruvian desert offer new clues to the origins and purpose behind the Nazca Lines.

17Season 49

S49.E17 ∙ Crypto Decoded

Wed, Nov 9, 2022

Unraveling the social and technological underpinnings of cryptocurrency, from bitcoin to NFTs.

18Season 49

S49.E18 ∙ Zero to Infinity

Wed, Nov 16, 2022

Explains where 0 came from & how to work with and think about infinity.

19Season 49

S49.E19 ∙ Rebuilding Notre Dame

Wed, Dec 14, 2022

Remarkable relating of the technical aspects and problems of restoring the Notre Dame cathedral to its glory prior to the fire. Includes fascinating revelations about the artistic and technical skill of the original builders.

101Season 49

S49.E101 ∙ Predicting My MS

Wed, Feb 23, 2022

The filmmaker looks back on his life, trying to understand why he contracted a rare form of Multiple Sclerosis: Primary Progressive Multiple Sclerosis.