Here is something most people do not know: the name "Big Bang" was meant to be a joke. On March 28, 1949, a British astronomer named Fred Hoyle went on BBC radio. He wanted to talk about how the universe began. Some scientists believed that all things -- every star, every planet. Every grain of sand -- started from a single tiny point that exploded outward billions of years ago. Hoyle thought that idea was ridiculous. He believed the universe had always existed and never had a beginning. To make fun of the other idea, he called it "the Big Bang. " He wanted it to sound silly. But something unexpected happened. People loved the name! It was easy to remember and fun to say. Scientists started using it too. Over time, evidence piled up that the Big Bang theory was actually correct. Scientists found that the universe is still expanding. All things in space is moving farther apart, like dots on a balloon being blown up. They also found leftover heat from the original explosion, still floating through space. The very name Hoyle invented to mock the theory became its most famous feature. Sometimes the best names come from the most unexpected places.