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It's Okay to Be Smart
Traffic Lights Are So Much Weirder Than You Realize
Why are stop lights red? The common explanation about red light traveling farther through fog is actually wrong. The real story involves early railroads, deadly accidents, an exploding gas traffic light, forgotten inventors, and even the evolution of primate color vision. Here’s how history and biology accidentally created the nearly perfect traffic signal.
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8:29
Is Everest the tallest mountain on Earth? The answer is not as simple as you might think.
17:59
Turns out we’re all at risk of being overconfident about something.
19:10
There's an absolutely weird, but surprisingly common phenomenon called sensory adaptation.
11:50
Scientists in Florida can recreate a Category 5 hurricane in a box the size of a bedroom.
10:41
Are humans still evolving? And how have our technological advances affected the process?
19:07
Illusions teach us how our brain constructs a three-dimensional reality using 2-D images.
22:18
Joe talks biology with science communicator extraordinaire Prof. Brian Cox.
9:42
We explore why animals like whales, elephants, and other large animals not get cancer.
10:16
The real magic of mirrors is far stranger and more interesting, as you’re about to learn.
17:56
Neuroscientist David Eagleman talks about illusions that make the moving picture possible.
