A bounty of potential gravitational wave events hints at exciting possibilities
Most are probably false alarms, but some could be spacetime ripples that are extra hard to spot
![illustration of gravitational waves forming around two black holes spiraling around one another](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/08/080321_ec_gravitational-waves_feat.jpg?fit=1030%2C580&ssl=1)
One way that gravitational waves (shown in this illustration) are stirred up is when two black holes spiral around one another and collide.
MARK GARLICK/SCIENCE PHOTO LIBRARY