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slash UK slash AI for people. Welcome to Scientific American Science Talk posted on April 29th,

2019. I'm Steve Murski. On this episode, and there were times where

it seemed like it was going to kind of all fall apart, but at a certain point, I got confident

that they were going to pull it off, but it was dicey from time to time. That's Seth Fletcher. He's

the author of the book Einstein's Shadow, a black hole, a band of astronomers, and the quest to see

the unseeable. It's an account of the long struggle to capture that image of a black hole that

was announced on April 10th. As Seth is also a Scientific American's chief features editor,

it was pretty easy to get him to sit down and talk about the book and the image.

Seth, what is the big deal about actually being able to visualize a black hole?

Why did they want to do this so badly?

Well, no one's ever seen a black hole.

Well, now we have.

But as of a couple weeks ago,

no one outside of the astronomers in the Event Horizon Telescope had seen a black hole.

This gets into all sorts of questions about what it means to actually see a black hole.

But for now, I'll just say that black holes kind of fell out of Einstein's general theory of relativity a hundred years ago more

than a hundred years ago um and people kind of refuse to believe that it had physical significance

...