Listening to the universe – black holes give us ears to gravitational waves
![](https://news.medill.northwestern.edu/chicago/wp-content/uploads/sites/3/2016/02/Einstein-New-1024x648.jpg)
By Danielle Prieur Scientists detected the gravitational light waves from two colliding black holes more than a billion light-years away. That means it took more than a billion years for that light to reach detectors on Earth. Yet the timing was perfect for physicist Gabriela Gonzalez, a professor at the Louisiana State University’s Department of Physics and […]