Up Next
Back to Show
NOVA
The Evidence for Planet Nine’s Existence
Two astronomers argue that the farthest objects in the Kuiper Belt are being pushed and pulled by the gravity of Planet Nine, a giant planet orbiting over 10 times farther from the Sun than Neptune. If they find it, it’ll be the first real expansion of the Sun’s planetary album in 170 years.
Support Provided By
Unlock with PBS Passport
52:52
A team uncovers the advanced engineering behind an ancient Egyptian war machine.
Unlock with PBS Passport
53:10
Shared DNA reveals a deep connection with our long-vanished human cousins.
1:53:49
A two-hour special from the producers of "Making Stuff"
53:10
Is our universe unique, or could it be just one in an endless "multiverse"?
53:40
Take a wild ride into the quantum realm, where even the impossible seems possible.
53:40
It defines our lives, but what is time really? Have a look into its true nature.
53:40
Surprising clues indicate that space is very much something and not nothing.
1:43:15
We are on the verge of answering one of the greatest questions in history: Are we alone?
Unlock with PBS Passport
53:05
Big quakes are inevitable, but can we prevent their devastation?
Unlock with PBS Passport
52:52
Can markets be rational when humans aren't?
Unlock with PBS Passport
1:42:48
Seven doctors, 21 years... Saving lives is only part of the story.
Unlock with PBS Passport
53:12
The "Car Talk" guys look for a new breed of clean, fuel-efficient vehicles.