For years, Grace had been trying to invent a machine that could clean water using only sunlight.
Her first forty designs failed. Some leaked, some broke, and one even caught fire.
Her friends told her she should have chosen an easier project.
One summer, while repairing a broken design, she noticed something unexpected: the "failed" parts were producing clean drops of water.
She had been looking at the problem the wrong way. The mistake was actually the solution.
After months of testing, she built a small, cheap device that could produce ten litres of clean water a day.
Today, thousands of villages use her invention, and it has won several awards.
When reporters ask for her secret, she always gives the same answer.
"Failure is not the opposite of success. It's part of it."
Practice
Answer the questions. Get 7 out of 10 to finish this lesson.