Black holes and the ‘hum’ of gravitational waves

For the first time, scientists have reported that they were able to “hear” low-frequency gravitational waves caused by the motion of massive black holes across the universe. It’s big news in the world of science and host Marco Werman gets a primer in terms non-scientists can understand. He speaks with Jason Hessels, chief astronomer at the Netherlands Institute for Radio Astronomy (ASTRON) in Amsterdam.

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