Mystery 1: How do plants split water into hydrogen and oxygen?

Scientists are researching how plants efficiently split water into hydrogen and oxygen. This process, known as photosynthesis, is essential for producing oxygen on Earth. Scientists are attempting to understand this process to develop better ways of producing clean fuels, such as hydrogen, without relying on plants. They use x-ray lasers to study the tiny factory within plant cells where water is split, but there is still more research needed to fully grasp the details of this important process.