Identity Crisis (rebroadcast)
Big Picture Science
00:00
Iris Scans - How Do They Work?
Each iris is different, even though they might look alike if you held a light up and stared at them very carefully. In invisible light, the melonon that gives me very dark eyes would allow other people to have blue eyes or green eyes. You can see the irish texture really well in all people's eyes. It turns out most of the world has really dark eyes.
Play episode from 38:12
Transcript
