Up Next
Back to Show
NOVA
Why Earth’s Core Is Younger Than Its Surface
Earth’s core is 2.5 years younger than the surface. According to Einstein’s theories of general and special relativity, time passes differently for different observers based on velocity and gravity. And those theories have helped us with navigation and fighting climate change.
Support Provided By
53:40
Is engineering humanity’s superpower? See how we can amplify our natural abilities in amazing ways.
Unlock with PBS Passport
53:34
Visit strange, frozen worlds to discover the bizarre ice that forms beyond Earth.
Unlock with PBS Passport
53:34
Discover the powerful volcanic eruptions that have shaped worlds across our solar system.
Unlock with PBS Passport
53:34
What are the weirdest worlds in our solar system, and how did they come to be?
Unlock with PBS Passport
53:34
Discover the dramatic forces creating spectacular weather on neighboring planets and moons.
53:38
Explore big discoveries that have revolutionized our understanding of the universe.
53:10
Follow the quest to recover DNA millions of years old for the very first time.