Extras

    Video thumbnail: NOVA What is CRISPR gene editing?

    NOVA

    What is CRISPR gene editing?

    Scientists have a new tool to edit genes in human cells to repair mutations. What is it?

    What is CRISPR gene editing?

    Video thumbnail: NOVA How Fast Does Santa Fly?

    NOVA

    How Fast Does Santa Fly?

    To make their delivery schedule, how quickly must Santa and his reindeer travel the world?

    How Fast Does Santa Fly?

    Video thumbnail: NOVA NOVA’s Big Ideas of 2017

    NOVA

    NOVA’s Big Ideas of 2017

    Take a look back with us at the biggest science stories of 2017.

    NOVA’s Big Ideas of 2017

    Video thumbnail: NOVA How to Prevent Train Crashes

    NOVA

    How to Prevent Train Crashes

    Could a safety technology have prevented a train crash in Washington that killed three?

    How to Prevent Train Crashes

    Video thumbnail: NOVA NOVA Goes Ballistic

    NOVA

    NOVA Goes Ballistic

    In honor of the New Year, we bring you a NOVA retrospective on ballistics.

    NOVA Goes Ballistic

    Video thumbnail: NOVA How Much Does a Thought Weigh?

    NOVA

    How Much Does a Thought Weigh?

    Even in your mind, energy goes with it—bottle up that energy and it has mass.

    How Much Does a Thought Weigh?

    Video thumbnail: NOVA When Turkeys Attack

    NOVA

    When Turkeys Attack

    Most wild turkeys are timid. But if one gets aggressive, what do you do?

    When Turkeys Attack

    Video thumbnail: NOVA Climate Action Without the Feds?

    NOVA

    Climate Action Without the Feds?

    Can states, cities, and companies fulfill US obligations to the Paris Accord on their own?

    Climate Action Without the Feds?

    Video thumbnail: NOVA What's Inside the Great Pyramid?

    NOVA

    What's Inside the Great Pyramid?

    Cosmic particles reveal a previously hidden void in the Great Pyramid of Khufu in Egypt.

    What's Inside the Great Pyramid?

    Video thumbnail: NOVA Will Robots Become Conscious?

    NOVA

    Will Robots Become Conscious?

    What makes a brain or machine conscious? This theory is beginning to provide some answers.

    Will Robots Become Conscious?

    Video thumbnail: NOVA Why Do We Like Being Scared?

    NOVA

    Why Do We Like Being Scared?

    If a neuroscientist designed a haunted house, would you dare to enter?

    Why Do We Like Being Scared?

    Video thumbnail: NOVA Why Home Runs Are on the Rise

    NOVA

    Why Home Runs Are on the Rise

    What’s behind the recent surge in home runs in baseball?

    Why Home Runs Are on the Rise

    Video thumbnail: NOVA New Kind of Astrophysics is Born

    NOVA

    New Kind of Astrophysics is Born

    Scientists saw and “heard” a dramatic cosmic explosion simultaneously for the first time.

    New Kind of Astrophysics is Born

    Video thumbnail: NOVA Can Math Detect Gerrymandering?

    NOVA

    Can Math Detect Gerrymandering?

    The Supreme Court is hearing a gerrymandering case. Mathematicians are watching closely.

    Can Math Detect Gerrymandering?

    Video thumbnail: NOVA Why Worry About ICBMs?

    NOVA

    Why Worry About ICBMs?

    What are intercontinental ballistic missiles (ICBMs), and why are they hard to shoot down?

    Why Worry About ICBMs?

    Video thumbnail: NOVA Why Did Houston Flood?

    NOVA

    Why Did Houston Flood?

    Hurricane Harvey broke continental U.S. records. Here's how cities can be better prepared.

    Why Did Houston Flood?

    Video thumbnail: NOVA How to Build the Universe

    NOVA

    How to Build the Universe

    A how-to guide for anyone planning to build a universe.

    How to Build the Universe

    Video thumbnail: NOVA Dinosaur Parasites

    NOVA

    Dinosaur Parasites

    Even the mighty T. rex was covered in creepy, crawly parasites.

    Dinosaur Parasites

    Video thumbnail: NOVA Unboxing the Universe

    NOVA

    Unboxing the Universe

    What if everything in the universe came to your doorstep...in a box?!

    Unboxing the Universe

    Video thumbnail: NOVA What Is Rabies?

    NOVA

    What Is Rabies?

    Rabies is preventable, but it still plagues around 60,000 people a year.

    What Is Rabies?

    Video thumbnail: NOVA Best Way to Learn to Ride a Bike

    NOVA

    Best Way to Learn to Ride a Bike

    Two centuries of bikes, and we’re still debating the best way to learn to ride one.

    Best Way to Learn to Ride a Bike

    Video thumbnail: NOVA How to Build Your Dragon

    NOVA

    How to Build Your Dragon

    Game of Thrones got us thinking — what would a real dragon look like?

    How to Build Your Dragon

    Video thumbnail: NOVA Why Does This Frog Have So Many Legs?!

    NOVA

    Why Does This Frog Have So Many Legs?!

    These frogs can have up to TEN back legs.

    Why Does This Frog Have So Many Legs?!

    Video thumbnail: NOVA How to Find an Exoplanet

    NOVA

    How to Find an Exoplanet

    Want to find another world beyond our solar system? Here are the 5 ways you can do it.

    How to Find an Exoplanet