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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’s Big Ideas of 2017
Take a look back with us at the biggest science stories of 2017.
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Could a safety technology have prevented a train crash in Washington that killed three?
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Even in your mind, energy goes with it—bottle up that energy and it has mass.
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Climate Action Without the Feds?
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Will Robots Become Conscious?
What makes a brain or machine conscious? This theory is beginning to provide some answers.
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Why Home Runs Are on the Rise
What’s behind the recent surge in home runs in baseball?
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New Kind of Astrophysics is Born
Scientists saw and “heard” a dramatic cosmic explosion simultaneously for the first time.
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Can Math Detect Gerrymandering?
The Supreme Court is hearing a gerrymandering case. Mathematicians are watching closely.
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Why Worry About ICBMs?
What are intercontinental ballistic missiles (ICBMs), and why are they hard to shoot down?
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Why Did Houston Flood?
Hurricane Harvey broke continental U.S. records. Here's how cities can be better prepared.
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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.
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What if everything in the universe came to your doorstep...in a box?!
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What Is Rabies?
Rabies is preventable, but it still plagues around 60,000 people a year.
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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
How to Build Your Dragon
Game of Thrones got us thinking — what would a real dragon look like?
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Why Does This Frog Have So Many Legs?!
These frogs can have up to TEN back legs.
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Clip: S44 | 3m 43s