Inventions: The pencil eraser was invented by accident.

The pencil eraser, a common tool used for correcting mistakes in writing, was actually invented by accident. In the 18th century, a scientist working with raw rubber accidentally picked up a piece and found that it could erase pencil marks. This discovery led to the development of the eraser as we know it today. The accidental invention of the pencil eraser shows how creativity and innovation can stem from unexpected sources and serendipitous moments.