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What is CRISPR gene editing?
Scientists have a new tool to edit genes in human cells to repair mutations. What is it?
Clip: S44 | 1m 24s
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How Fast Does Santa Fly?
To make their delivery schedule, how quickly must Santa and his reindeer travel the world?
Clip: S44 | 3m 10s
NOVA Goes Ballistic
In honor of the New Year, we bring you a NOVA retrospective on ballistics.
Clip: S44 | 1m 11s
NOVA’s Big Ideas of 2017
Take a look back with us at the biggest science stories of 2017.
Clip: S44 | 3m 8s
How to Prevent Train Crashes
Could a safety technology have prevented a train crash in Washington that killed three?
Clip: S44 | 1m 20s
How Much Does a Thought Weigh?
Even in your mind, energy goes with it—bottle up that energy and it has mass.
Clip: S44 | 3m 57s
Climate Action Without the Feds?
Can states, cities, and companies fulfill US obligations to the Paris Accord on their own?
Clip: S44 | 2m 47s
When Turkeys Attack
Most wild turkeys are timid. But if one gets aggressive, what do you do?
Clip: S44 | 2m 36s
What's Inside the Great Pyramid?
Cosmic particles reveal a previously hidden void in the Great Pyramid of Khufu in Egypt.
Clip: S44 | 1m 45s
Will Robots Become Conscious?
What makes a brain or machine conscious? This theory is beginning to provide some answers.
Clip: S44 | 6m 13s
Why Do We Like Being Scared?
If a neuroscientist designed a haunted house, would you dare to enter?
Clip: S44 | 3m 21s
Why Home Runs Are on the Rise
What’s behind the recent surge in home runs in baseball?
Clip: S44 | 3m 15s
New Kind of Astrophysics is Born
Scientists saw and “heard” a dramatic cosmic explosion simultaneously for the first time.
Clip: S44 | 2m
Can Math Detect Gerrymandering?
The Supreme Court is hearing a gerrymandering case. Mathematicians are watching closely.
Clip: S44 | 3m 5s
Why Worry About ICBMs?
What are intercontinental ballistic missiles (ICBMs), and why are they hard to shoot down?
Clip: S44 | 2m 59s
Why Did Houston Flood?
Hurricane Harvey broke continental U.S. records. Here's how cities can be better prepared.
Clip: S44 | 3m 19s
How to Build the Universe
A how-to guide for anyone planning to build a universe.
Clip: S44 | 4m 23s
Even the mighty T. rex was covered in creepy, crawly parasites.
Clip: S44 | 2m 49s
Unboxing the Universe
What if everything in the universe came to your doorstep...in a box?!
Clip: S44 | 4m 20s
What Is Rabies?
Rabies is preventable, but it still plagues around 60,000 people a year.
Clip: S44 | 5m 4s
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.
Clip: S44 | 2m 16s
Why Does This Frog Have So Many Legs?!
These frogs can have up to TEN back legs.
How to Build Your Dragon
Game of Thrones got us thinking — what would a real dragon look like?
Clip: S44 | 2m 17s
How to Find an Exoplanet
Want to find another world beyond our solar system? Here are the 5 ways you can do it.
Clip: S44 | 3m 43s