Hi, you're about to get smarter in just a few minutes with Curiosity Daily from Curiosity.com.

I'm Cody Gough. And I'm Ashley Hamer.

Today you learn about why the first black hole ever discovered is bigger than we thought.

Then you'll learn about spider hearing with help. whole ever discovered is bigger than we thought.

Then you'll learn about Spider hearing

with help from Cornell University Professor Ron Hoy.

Let's satisfy some curiosity.

Signis X1 just won't quit.

It's a binary star system, pretty close to Earth,

where a blue super giant star and a black hole orbit each other.

The black hole was the first one humans ever discovered and

new research shows that it's way bigger than scientists thought. In fact, it's now a

record holder, even if that record has a lot of caveats.

It's the most massive electromagnetically detected stellar mass black hole ever discovered.

Electromagnetically detected, as in not detected via its gravity,

and stellar mass as in not a supermassive black hole.

Good job, big guy. Anyway, black holes are notoriously hard to spot, but the

black hole in Signis X1 is one of the black holes closest to Earth, and it's producing X-rays that we can detect

thanks to its interaction with its companion's star.

So it's not a huge surprise that it was the first

that astronomers discovered way back in 1964. Now more than a half century later

astronomers used a telescope array that spanned the entire United States

...