Can a cat be both alive and dead? Can a computer think? How does a tortoise beat Achilles in a race? Voiced by comedian David Mitchell, these fast-paced animations explain six famous thought experiments, from the ancient Greeks to Albert Einstein, that have changed the way we see the world. Subjects…

Ancient mathematical trickery proves that a mighty hero cannot overtake a tortoise.

Transcript -- Ancient mathematical trickery proves that a mighty hero cannot overtake a tortoise.

A well known story that questions the logic of time travel.

Transcript -- A well known story that questions the logic of time travel.

An argument against computers ever being truly intelligent.

Transcript -- An argument against computers ever being truly intelligent.

A never-ending hotel, always full of guests, helps to explain the nature of infinity.

Transcript -- A never-ending hotel, always full of guests, helps to explain the nature of infinity.

An identical twin in space illustrates Einstein's special theory of relativity.

Transcript -- An identical twin in space illustrates Einstein's special theory of relativity.

This famous experiment tackling quantum theory involves a cat in a potentially lethal box.

Transcript -- This famous experiment tackling quantum theory involves a cat in a potentially lethal box.