Get curated editors’ picks, peeks behind the scenes, film recommendations and more.
Are you a person existing within a vast universe, or a brain formed spontaneously in a void, hallucinating this very moment? Your experience would almost certainly lead you to believe the former. However, since cosmologists building on the work of the Austrian physicist Ludwig Eduard Boltzmann (1844-1906) suggested that the latter is actually far more likely, it’s created a complex puzzle for logicians, cosmologists and philosophers to try and untangle. Taking viewers on a mind-bending jaunt through modern cosmology, this brief animation from TED-Ed explains why the ‘Boltzmann brain paradox’ was born, the arguments some thinkers use to counter it, and why it’s a useful thought experiment, even if you didn’t just pop into existence to contemplate a thermodynamic puzzle.
video
Cosmology
Tiny, entangled universes that form or fizzle out – a theory of the quantum multiverse
11 minutes
video
Rituals and celebrations
A beginner’s guide to a joyful Persian tradition of spring renewal and rebirth
3 minutes
video
Astronomy
The history of astronomy is a history of conjuring intelligent life where it isn’t
34 minutes
video
Metaphysics
Simple entities in universal harmony – Leibniz’s evocative perspective on reality
4 minutes
video
Biography and memoir
Passed over as the first Black astronaut, Ed Dwight carved out an impressive second act
13 minutes
video
Engineering
A close-up look at electronic paper reveals its exquisite patterns – and limitations
9 minutes
video
Biography and memoir
The unique life philosophy of Abdi, born in Somalia, living in the Netherlands
29 minutes
video
Cognition and intelligence
What’s this buzz about bees having culture? Inside a groundbreaking experiment
8 minutes
video
Earth science and climate
The only man permitted in Bhutan’s sacred mountains chronicles humanity’s impact
22 minutes