Skip to Main Content
NOVA

What Is Blockchain?

Here's how a blockchain tracks and theoretically secures the movement of digital currency.

Aired 02/07/2018

NOVA

What Is Blockchain?

Clip: Season 45 | 3m 17s

Here's how a blockchain tracks and theoretically secures the movement of digital currency.

Here's how a blockchain tracks and theoretically secures the movement of digital currency.

Aired 02/07/2018

Problems with Closed Captions? Closed Captioning Feedback

Problems with Closed Captions? Closed Captioning Feedback

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

Support provided by:

Carlisle

Jupiter's Latest Moon Discovery

Clip: S45 | 1m 20s | As if 67 moons weren’t enough, scientists discovered 12 new ones orbiting the planet. (1m 20s)

Big Science Ideas of 2018

Video has Closed Captions

Clip: S45 | 2m 48s | Take a look back at some of the biggest science stories of 2018. (2m 48s)

Fireproofing Our Future through Better Design

Video has Closed Captions

Clip: S45 | 3m 37s | Before a wildfire ever starts, there are ways to make homes and buildings safer. (3m 37s)

Turn to Science for Great Thanksgiving Stuffing

Video has Closed Captions

Clip: S45 | 3m 24s | Learn the secret to making delicious stuffing that's not gummy. (3m 24s)

Winter Is Coming… And So Is Seasonal Depression

Video has Closed Captions

Clip: S45 | 3m 4s | As the days shorten, our internal clocks have to recalibrate. But that's hard for some. (3m 4s)

Modern Politics Activates the Brain's Ancient Wiring

Video has Closed Captions

Clip: S45 | 3m 9s | How does your brain process political ideas? (3m 9s)

What is the Coriolis Effect?

Video has Closed Captions

Clip: S45 | 4m 18s | The spinning of the Earth means we don't always see straight paths as straight. (4m 18s)

Healing After Hurricane Maria

Video has Closed Captions

Clip: S45 | 5m 33s | Antonio Paris translates how to survive on other planets into surviving after Maria. (5m 33s)

The Arecibo Observatory

Video has Closed Captions

Clip: S45 | 3m 58s | After Hurricane Maria, the Arecibo Observatory staff worked to rebuild its facility. (3m 58s)

Macaque Monkeys Adapt After Hurricane Maria

Video has Closed Captions

Clip: S45 | 4m 44s | Researchers investigate whether 1800 macaques may have been changed by Hurricane Maria. (4m 44s)

Distributed Energy in Puerto Rico

Video has Closed Captions

Clip: S45 | 7m 15s | Puerto Ricans are innovating to find new energy solutions after Hurricane Maria. (7m 15s)

Hawaii’s Kilauea Volcano Erupts

Clip: S45 | 1m 14s | New fissures are devastating neighborhoods on Hawaii’s Big Island. (1m 14s)

How to Slow Down Time

Video has Closed Captions

Clip: S45 | 3m 48s | In different but similar ways, both your brain and the laws of physics can slow down time. (3m 48s)

The World’s Smartest Dog

Video has Closed Captions

Clip: S45 | 6m 9s | Remembering John Pilley, the owner and trainer of Chaser the Border Collie. (6m 9s)

Liquid Water Found on Mars

Video has Closed Captions

Clip: S45 | 2m 18s | Scientists found a large body of liquid water beneath the southern ice caps of Mars. (2m 18s)

NASA Heads to the Sun

Video has Closed Captions

Clip: S45 | 1m 9s | NASA launched a new spacecraft to study the Sun like never before. (1m 9s)

Is Grilled Food Bad for You?

Video has Closed Captions

Clip: S45 | 4m 21s | Explore the science of grilling and how it could affect your health. (4m 21s)

What Is What the Physics?!

Clip: S45 | 35s | What the Physics?! is about the physics in you, of you, and around you. (35s)

Physics Is Erasing Your Memory

Video has Closed Captions

Clip: S45 | 4m 53s | Thanks to physics, no memory can last forever. (4m 53s)

Separation and Children’s Brains

Video has Closed Captions

Clip: S45 | 3m 19s | Even brief separations can impair the brain development of a young child or infant. (3m 19s)

What Does an Atom Look Like?

Video has Closed Captions

Clip: S45 | 3m 27s | It’s pretty different from the atom you saw in your textbooks. (3m 27s)

Tale of Two Volcanoes

Clip: S45 | 2m 38s | Hawaii’s Kilauea and Guatemala’s Fuego volcanic eruptions have been remarkably destructive (2m 38s)

Net Neutrality’s End and Science

Video has Closed Captions

Clip: S45 | 3m 3s | Depending on your perspective, the repeal of net neutrality could help or hurt science. (3m 3s)

What Does Dark Energy Look Like?

Video has Closed Captions

Clip: S45 | 4m 16s | The mysterious substance ripping our universe apart. (4m 16s)

Can You Upload Your Brain?

Video has Closed Captions

Clip: S45 | 3m 7s | How the laws of physics forbid perfect cloning. (3m 7s)

Ethics and Self-Driving Cars

Clip: S45 | 2m 57s | How do we program moral decision-making into autonomous vehicles? (2m 57s)

Black Hole Information Paradox

Video has Closed Captions

Clip: S45 | 3m 56s | Do black holes delete information forever? Or could information somehow escape them? (3m 56s)

Choose Your Own Adventure into a Black Hole

Video has Closed Captions

Clip: S45 | 37s | What would it be like to fall into a black hole? Choose your own adventure to find out! (37s)

The Next Quest for New Worlds

Clip: S45 | 2m 15s | There are worlds beyond our own. A new explorer just left Earth to hunt for them. (2m 15s)

Why Fart Sounds Are Funny

Clip: S45 | 2m 16s | April Fool's! We weigh in on the serious science behind... whoopee cushions. (2m 16s)

Fake or Physics?

Video has Closed Captions

Clip: S45 | 2m 9s | Guess which of these five unbelievable facts are real physics. (2m 9s)

Remembering Stephen Hawking

Video has Closed Captions

Clip: S45 | 2m 48s | Stephen Hawking had a way of bringing the most cosmic ideas down to Earth. (2m 48s)

Saving Snowy Owls from Airplanes

Clip: S45 | 3m 25s | When snowy owls land at Logan Airport, Norman Smith gives the birds a one-way flight out. (3m 25s)

The Physics of the Multiverse

Video has Closed Captions

Clip: S45 | 4m 12s | A multiverse could explain why our universe is fine-tuned for life. (4m 12s)

What Is Dark Matter? A New Clue!

Video has Closed Captions

Clip: S45 | 3m 38s | A signal from the dawn of the universe may hold surprising clues about dark matter. (3m 38s)

Celebrating Black Scientists

Clip: S45 | 56s | In honor of Black History Month, we celebrate these black scientists. (56s)

Curling, A Great Physics Mystery

Clip: S45 | 4m 32s | To physicists, curling presents the most puzzling conundrum in the Olympic Games. (4m 32s)

The Biggest Puzzle in Physics

Video has Closed Captions

Clip: S45 | 4m 41s | Sometimes the biggest puzzle in physics seems like the worst relationship in the universe. (4m 41s)

Wild Ways to Find a Mate

Clip: S45 | 3m 44s | From necking giraffes to monogamous parasites, creatures couple up in unexpected ways. (3m 44s)

What The Physics?! - Q&A

Video has Closed Captions

Clip: S45 | 7m 37s | "What The Physics?!" host, Greg Kestin, answers questions from you, our viewers. (7m 37s)

What Is Blockchain?

Clip: S45 | 3m 17s | Here's how a blockchain tracks and theoretically secures the movement of digital currency. (3m 17s)

What Is Bitcoin?

Clip: S45 | 2m 14s | Bitcoin and other cryoptocurrencies—the future of money or hype? Here's what they are. (2m 14s)

Seeing Quantum with the Naked Eye

Video has Closed Captions

Clip: S45 | 3m 55s | Simply squinting at a lamp highlights the quantum nature of light. (3m 55s)

Can Tech Save Players’ Brains?

Clip: S45 | 2m 49s | Football is a full-contact sport, but can a high tech mouth guard help save players’ brain (2m 49s)

Predicting Landslides

Clip: S45 | 1m 34s | How might science help avoid tragic deaths caused by landslides? (1m 34s)

Does the Flu Shot Work?

Clip: S45 | 2m 14s | The flu vaccine changes from year to year and its efficacy varies. Here’s why. (2m 14s)

How NASA’s Apollo 8 Left Earth’s Orbit

Clip: S45 Ep18 | 2m 24s | Apollo 8 was the first in the world to head to the moon using trans-lunar injection. (2m 24s)

Five Apollo 8 Technological Breakthroughs

Clip: S45 Ep18 | 2m 32s | The Apollo 8 spacecraft—and its mission—marked a revolution in spaceflight. (2m 32s)

Capturing "Earthrise" from Apollo 8

Video has Closed Captions

Clip: S45 Ep18 | 1m 45s | Many consider “Earthrise,” to be one of the most important photos of the 20th century. (1m 45s)

Apollo's Daring Mission Sneak Peek

Video has Closed Captions

Preview: S45 Ep18 | 1m 17s | Apollo astronauts and engineers tell the story of the first manned mission to the moon. (1m 17s)

Providing Support for PBS.org

Learn Moreabout PBS online sponsorship

Support for PBS provided by:

National Corporate funding for NOVA is provided by Carlisle Companies. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

Sign in with Email

or

Continue with GoogleContinue with FacebookContinue with Apple

By creating an account, you acknowledge that PBS may share your information with our member stations and our respective service providers, and that you have read and understand the Privacy Policy and Terms of Use.

Are you sure you want to remove null from My List?