What Does a Black Hole Collision Sound Like?

For centuries, the primary way that astronomers studied outer space was through sight. But just ten years ago, scientists successfully established a way to ‘listen’ to our cosmos – detecting gravitational waves created by huge cosmic events that took place billions of light years away. NPR science correspondent Nell Greenfieldboyce explains how scientists detect those gravitational waves, what kind of cosmic events we’re detecting now, and what they could tell us about our universe.

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