Those internet security tests that ask you to retype blurry numbers or pick out photos of traffic lights have an important job: They stop robots from gumming up the internet. But by using them everywhere, we’re training computers to see the world like we do, and they’re getting really good at it. What happens as it gets harder to prove our humanity online?

Photo by Eric Helgas; styling by Alex Citrin-Safadi

Transcript: https://qz.com/2060828