Black holes can sometimes crash into each other! Black holes are areas in space that are so dense, that they have a very strong gravitational pull. Their gravity is so strong that even light can’t escape. When two black holes collide, they release a huge amount of energy. This causes a gravitational wave, or a ripple effect across the universe.
To learn more about black holes, check out my episode by clicking the following link: youtu.be/7wAqyATfiyM