The Big Think Interview

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Intimate interviews with the world's biggest thinkers.
Latest episode
The solar revolution turning sunlight into synthetic fuel
“10 years ago, my colleagues and I looked at the prognosis for climate change, and it looked pretty hopeless. There really was no way out. But something happened – something good.”

Casey Handmer

A detailed orange image of the Sun shows its surface texture and sunspots, against a black background.
A man sits with his head in his hands, while colorful tangled lines are illustrated over his head against a blue background, suggesting confusion or mental stress.
18mins
“By not focusing on the outcome and instead designing a tiny experiment, what you can do is letting go of any definition of success, letting go of that binary results that you're looking for, and instead focusing something that makes you feel curious and that you want to explore.”
A radio telescope points at the night sky, where stars are arranged in the shape of a large question mark.
13mins
"We've sent out one or two little messages, but we certainly aren't investing billions of dollars shouting out into the cosmos saying, "Hey, we are here. Come say hi.""
A magnifying glass focusing on concentric circles against a plain teal background.
19mins
"It's a very, very beautiful calculation, but it's the best example I know of the relationship between these rather abstract quantities perhaps and something that you can look at in a telescope."
An illustration of a human brain tightly bound with red rope, set against a textured background with blue and brown patches.
21mins
"You can't possibly exaggerate how much better it is to live in a peaceful, orderly society, and to be wealthy, and healthy, and surrounded by people who you love."
Two silhouetted figures against a blue background, with one appearing to whisper to the other.
16mins
“CIA classifies their secrets according to different terminology. There's confidential secrets, there are secret level secrets, and then there are top secret secrets. And the way that they define each of these different levels actually has to do with the impact that would occur if the secret became public knowledge.”
A foam structure shaped like a human brain is surrounded by translucent bubbles on a black background.
18mins
“We know that as little as 10 minutes of walking can improve your mood, that is getting that bubble bath with the dopamine, serotonin, endorphins going, anybody can do that.”
A heart shape is cut out of paper, revealing a circuit board with computer chips and code underneath.
4mins
"If we did create beings that were more like non-human animals, we ought to treat them much better than we now treat non-human animals."
A man wearing a black blazer, graphic T-shirt, and backwards cap stands against a plain background with his hands raised in a questioning gesture.
6mins
“You might as well go for it. You might as well do the thing that you dream about doing for heaven's sake.”
A person sits alone on a bench against a yellow background, looking down at a smartphone.
12mins
“You can debate all sorts of things about how the texture of American life has changed. What you can't debate is the sheer, objective, existential fact that Americans are more alone than ever.”
A monarch butterfly with orange and black wings rests on water, creating a ripple pattern around it.
5mins
“When you think about this interconnection of all these tiny causes and effects which add up to the way the world unfolds, it becomes impossible to imagine that we have complete control.”
The U.S. Capitol building is shown with large red tape strips crossed over it against a blue sky, symbolizing restriction or a government shutdown.
7mins
"I'd prefer to think about a different axis, which is, should government be more or less effective? Should government work faster or slower?"
Marble bust of a bearded man with eyes closed and mouth covered by a strip of black tape, set against a black background.
20mins
“Even if there are beliefs that we hold that are true, if we prevent people challenging those beliefs, we will lose our understanding of why they're true.”
An astronaut in a spacesuit stands facing a large red planet or celestial body with a glowing edge against a black background.
18mins
“We are beginning to take our first steps out into the cosmic ocean… and the water seems inviting.”
A silhouette of a person seated with blurred movement in the background and large text reading "KNOW YOUR EXIT" on the right.
18mins
“The fear of panic has killed more people than most disasters themselves.”
A human hand appears to hold a glowing celestial object surrounded by small planets and stars, creating the illusion of a miniature universe in the palm.
11mins
"We are all in orbit around the center of the Milky Way galaxy. How big is this collection of stars? Somewhere between 200 and 400 billion suns in the Milky Way galaxy, about 100,000 light years across."
A note pinned to a wall with the words "1 Rule to Focus" in red, viewed through the crosshairs of a scope or lens.
12mins
“The very same time that’s making you anxious is actually your most valuable asset. You can always create more energy and more money—but you can never create more time.”
A dinosaur stands in a field as a flaming asteroid falls from the sky; bold text reads "DON'T BE THE DINOSAUR.
8mins
"You need to embrace these systems and try out what's going on because if you don't understand it, you really can't hope to help your organization adapt and stay in front of this momentous, world-changing technology."
A lighthouse shines its beam at dusk with the words "HAPPINESS GUIDES" in large white text over the image.
5mins
"I think happiness is not a smiling face, it's more a smiling soul."
A man in a blazer holds up a yellow card with black line drawings and gestures with his other hand against a plain background.
8mins
"There is interesting ethical questions about how we should actually conduct ourselves in [a space colonization] exploration phase."