Season 49

episodes

1. 1. Arctic Sinkholes 2022-02-02 55 min 8.0 In the Arctic, enormous releases of methane, a potent greenhouse gas, threaten the climate.
2. 2. Secrets in the Scat 2022-02-09 55 min 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,...
3. 3. Great Mammoth Mystery 2022-02-16 55 min Sir David Attenborough investigates a unique site in southern England where amateur fossil hunters uncovered giant mammoth bones and evidence of Neanderthals. A team of paleontologists and archaeologi...
4. 4. Augmented 2022-02-23 55 min 6.0 Follow the dramatic personal journey of Hugh Herr, a biophysicist working to create brain-controlled robotic limbs. At age 17, Herr’s legs were amputated after a climbing accident. Frustrated by the c...
5. 5. Determined: Fighting Alzheimer's 2022-04-06 55 min Follow three women at risk of developing Alzheimer’s as they join a groundbreaking study to try to prevent the disease – sharing their ups and downs, anxiously watching for symptoms, and hoping they c...
6. 6. Dinosaur Apocalypse: The New Evidence 2022-05-11 55 min In the Badlands of North Dakota, a team of scientists think they might have found the fossilized remains of animals killed on the day an asteroid struck Earth 66 million years ago. The evidence points...
7. 7. Dinosaur Apocalypse: The Last Day 2022-05-11 54 min In the second episode of this two-part series, the search continues for signs of what happened on the day the dinosaurs died. Scientists uncover extremely rare fossils and more evidence that could lin...
8. 8. Why Ships Crash 2022-05-18 54 min When the bow of the colossal Ever Given container ship plowed into the bank of the Suez Canal on March 23, 2021, international supply chains ground to a halt. What went wrong? Follow the dramatic effo...
9. 9. Ice Age Footprints 2022-05-25 54 min Thousands of ancient footprints stretch for miles across New Mexico’s White Sands National Park, capturing moments when Ice Age humans encountered now-extinct beasts, including mammoths and enormous g...
10. 10. Ultimate Space Telescope 2022-07-13 54 min How did NASA engineers build and launch the most ambitious telescope of all time? Follow the dramatic story of the James Webb Space Telescope—the most complex machine ever launched into space. If it w...
11. 11. Saving Venice 2022-09-28 54 min Rising seas and sinking land threaten to destroy Venice. Can the city’s new hi-tech flood barrier save it? Discover the innovative projects and feats of engineering designed to stop this historic city...
12. 12. Ending HIV in America 2022-10-05 54 min Almost 40 years after the discovery of HIV, could we be on the verge of ending the AIDS epidemic in America? How did scientists tackle one of the most elusive deadly viruses to ever infect humans? Can...
13. 13. Computers v. Crime 2022-10-12 54 min 5.5 In police departments and courts across the country, artificial intelligence is being used to help decide who is policed, who gets bail, how offenders should be sentenced, and who gets parole. But is...
14. 14. Can Psychedelics Cure? 2022-10-19 54 min Hallucinogenic drugs—popularly called psychedelics—have been used by human societies for thousands of years. Today, scientists are taking a second look at many of these mind-altering substances – both...
15. 15. Ocean Invaders 2022-10-26 54 min Lionfish–long prized in home aquariums–have invaded the Atlantic, and are now one of the ocean’s most successful invasive species, wreaking havoc in waters across the globe. Join ocean explorer Danni...
16. 16. Nazca Desert Mystery 2022-11-02 54 min One of the world’s greatest ancient enigmas, the Nazca lines are a dense network of criss-crossing lines, geometric shapes, and animal figures etched across 200 square miles of Peruvian desert. Who cr...
17. 17. Crypto Decoded 2022-11-09 53 min From Bitcoin to NFTs, crypto is making headlines. But what exactly is it, and how does it work? Experts go beyond the hype and skepticism to unravel the social and technological underpinnings of crypt...
18. 18. Zero to Infinity 2022-11-16 54 min Discover how the concepts of zero and infinity revolutionized mathematics.
19. 19. Rebuilding Notre Dame 2022-12-14 54 min In April 2019, the world watched as a devastating fire almost destroyed Paris’s iconic Notre Dame Cathedral. Go behind the scenes with a team of engineers, masons, and timber workers tackling the daun...