Get curated editors’ picks, peeks behind the scenes, film recommendations and more.
If you tied a rope tight around the Earth’s equator and then added a single yard of slack, would the extra material make any noticeable difference to someone standing on the ground? Yes, actually. The answer comes as a surprise to most people, but the additional bit of rope raises it high enough off the ground for our eyes to easily discern it, and our feet to easily trip over. That fact might seem trivial, but the early 20th-century philosopher Ludwig Wittgenstein believed that this chasm between human intuition and physical reality revealed something important about the fallibility of our thinking. After all, if something that seems obvious to almost everyone can be totally false, what else might we be wrong about? This video from the Center for Public Philosophy at the University of California, Santa Cruz breaks down the mathematics behind Wittgenstein’s knotty example, and asks whether it should make us all feel a bit less certain about even our most deeply held beliefs.
video
Home
How an artist transformed a dilapidated hunting lodge into a house made of dreams
8 minutes
video
Animals and humans
Are zoos and natural history museums born of a desire to understand, or to control?
57 minutes
video
Family life
The migrants missing in Mexico, and the mothers who won’t stop searching for them
21 minutes
video
Virtues and vices
Why Jean-Jacques Rousseau and Adam Smith were divided on the virtues of vanity
5 minutes
video
Beauty and aesthetics
In art, the sublime is a feedback loop, evolving with whatever’s next to threaten us
9 minutes
video
Family life
One family’s harrowing escape from postwar Vietnam, told in a poignant metaphor
10 minutes
video
War and peace
A frontline soldier’s moving account of the fabled ‘Christmas truce’ of 1914
12 minutes
video
Bioethics
What a 1970 experiment reveals about the possibility and perils of ‘head transplants’
6 minutes
video
Animals and humans
The wild tale of a young animal keeper, an angry tiger and a torn circle net
10 minutes