TV
News
Podcasts
Events
Account
Support us
Membership
Leadership Circle
Legacy Circle
Corporate Sponsorship
Vehicle Donations
Donor Advised Funds (DAFs)
Tax-free IRA gifts
Gifts of Stock
Matching Gifts
Donate
TV
Featured
Series
Movies
Live
Schedule
My list
TV
Series
Movies
Live
Schedule
My list
News
Politics
Investigations
Briefs
Culture
Podcasts
Black Arts Legacies
Cascade PBS Ideas Festival
Civic Cocktail
Crosscut Escapes
Mossback
Northwest Reports
Out & Back
Your Last Meal
This Changes Everything
Events
Ideas Festival
Search
Sign in
Newsletter
Help
Contact Us
About
Become a member
Watch with PBS Passport
This episode is available to watch with PBS Passport.
Sign up
Already have an account?
Sign in
Infinite Series
What was Fermat’s “Marvelous" Proof?
Add to My list
Added
I like this
Liked
I dislike this
Disliked
Advertisement
All episodes
Specials
Extras
Similar
