Tons of important scientific discoveries actually happened accidentally. Even the creation of microwaves.

"While testing a new vacuum tube called a magnetron, he discovered that a chocolate bar in his pocket had melted from the heat. He decided to try another experiment by placing some popcorn kernels near the magnetron, and he watched as the kernels popped into fluffy popcorns."

https://celcook.ca/the-accidental-invention-of-the-microwave/