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What Gives Hot Peppers Their Heat?
When you eat peppers, the chemical capsaicin fits into the heat pain receptors in your mouth, sending a false signal that’s identical to the one your brain would receive if you ate something literally burning hot.
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53:31
Scientists look to geoengineering and other methods to cool the planet.
53:21
Can bringing predators—and fear—back into an ecosystem help restore its natural balance?
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53:21
Follow the epic journey of dog domestication and see what science says about dogs’ love.
1:52:46
Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
53:30
Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
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53:25
Can new engineering techniques help prevent deadly bridge collapses?
53:15
Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
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53:32
Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
53:22
In the shadow of Vesuvius and Pompeii, a lesser-known volcano puts Naples at risk.
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53:34
New technologies are promising a new renaissance in space travel.
53:23
New archeological evidence shows the stunning engineering of the Great Pyramid of Giza.