Skip to main content

Up Next

Could You Be a Chimera?

Could You Be a Chimera?

Season 7 Episode 14
9:43
Why We Are Losing the Night Sky

Why We Are Losing the Night Sky

Season 7 Episode 16
10:26
Why do Trees Talk to Each Other?

Why do Trees Talk to Each Other?

Season 7 Episode 17
5:27
How Blind People See With Sound

How Blind People See With Sound

Season 7 Episode 18
16:07
Why Don't Birds Lay Square Eggs?

Why Don't Birds Lay Square Eggs?

Season 7 Episode 19
7:21
7 Scientific Urban Legends Debunked!

7 Scientific Urban Legends Debunked!

Season 7 Episode 20
11:24
What Color Is A Banana?

What Color Is A Banana?

Season 7 Episode 23
8:46
Back to Show
It's Okay to Be Smart

Is Your Eye Color Real?

Season 7 Episode 10

The eyes are often the first thing we see when we look at someone. And when you look at them up close, everyone’s eye color is a kaleidoscope of shapes and hues. How does eye color work? The answer involves some very cool physics, and probably isn’t what you were taught in school.

Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
Season
How We Solved the Greatest Riddle In Navigation
13:41
The secret is In order to know WHERE you are, you need to first know WHEN you are.
Why 8 Eyes Are Better Than 2 (…If You're a Spider)
15:07
We learn how spider vision works.
The Unbelievable Story of Earth’s Most Epic Flood
12:44
Let's learn the story of one of the worst natural disasters that’s ever happened!
The Biggest Myth About Climate Change
27:56
We learn about all the reasons that Earth’s climate changes, natural and otherwise.
The Crime Wave We Can Blame on… Neutron Stars?
12:31
Turns out, we can blame it all on neutron stars and some oddities of the periodic table.
Why is Puberty so Weird?
10:00
Join Joe in this whirlwind tour of the endocrine system to find the answers.
Why No One Can Agree What’s Really the Tallest Mountain
8:29
Is Everest the tallest mountain on Earth? The answer is not as simple as you might think.
Trying to Land a Plane (to Prove a Point)
17:59
Turns out we’re all at risk of being overconfident about something.
Why You Can’t Smell Yourself?
19:10
There's an absolutely weird, but surprisingly common phenomenon called sensory adaptation.
Making a Hurricane Indoors (For Science)
11:50
Scientists in Florida can recreate a Category 5 hurricane in a box the size of a bedroom.
Are Humans Still Evolving?
10:41
Are humans still evolving? And how have our technological advances affected the process?
How Illusions Can Explain Reality
19:07
Illusions teach us how our brain constructs a three-dimensional reality using 2-D images.
Active loading indicator