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Clip: Season 44 | 3m 57s
Anywhere information goes, even in your mind, energy goes with it—bottle up that energy and it has mass.
Aired: 12/06/17
How Much Does a Thought Weigh?
Scientists have a new tool to edit genes in human cells to repair mutations. What is it?
To make their delivery schedule, how quickly must Santa and his reindeer travel the world?
Could a safety technology have prevented a train crash in Washington that killed three?
Climate Action Without the Feds?
Can states, cities, and companies fulfill US obligations to the Paris Accord on their own?
What's Inside the Great Pyramid?
Cosmic particles reveal a previously hidden void in the Great Pyramid of Khufu in Egypt.
What makes a brain or machine conscious? This theory is beginning to provide some answers.
New Kind of Astrophysics is Born
Scientists saw and “heard” a dramatic cosmic explosion simultaneously for the first time.
Experts drill into the impact crater of an asteroid that created a worldwide cataclysm.
NOVA uncovers the secrets of nature’s battleground—claws, horns, fangs and all.
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
How has China’s magnificent Forbidden City withstood centuries of earthquakes?
Discover the world of medieval knights and see how their armor was made.
Follow Cassini's final days as it skims the cloud tops before plunging into the planet.
The country’s first solar eclipse in 99 years will cast a light on the Sun’s secrets.
