Astronomy
How Gravitational Waves Reveal Cosmic Collisions
Quick fact
The first direct detection of gravitational waves in 2015 came from two black holes colliding 1.3 billion light-years away, confirming a prediction Einstein made in 1916.
Why this is interesting
Imagine throwing a stone into a pond and watching ripples spread across the water. What if the pond was the fabric of the universe itself, and the stone was two black holes spiraling into each other?