BrainStuff

We've all heard about the supposed relationship between confidence and knowledge - but is it true? Two researchers think they've found the answer.

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Your saliva makes things taste great while killing bacteria and helping digestion.

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How can a camera's flash make your eyes glow red? Tune in to learn how it works -- and how to prevent it.

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Christian explains why male humans' voices generally get lower than female humans' during puberty.

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Honey bees are vanishing? But why?

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The future of your favorite TV shows hinges on their ratings – but what is a rating, and where does it come from?

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The next time you honk your car horn at that jerk who cut you off, you’ll understand how it uses physics to get the job done.

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We’ve all seen movies with supervillains building catastrophic Doomsday devices – but has anyone ever built a real one? Join Christian to learn how the Cold War led to the most dangerous nuclear system in history: Russia’s legendary – and terrifying – Dead Hand.

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There are many misconceptions about what causes the Aurora Borealis when it really requires solar winds, magnetic fields and excited atmospheric gases.

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Christian defines what white noise actually is and how it's used to mask other annoying sounds.

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