Now do this put-the-text-back-together activity.
This is the text (if you need help).
Scientists did tests to try to reverse ageing. The test was a simple one. It used oxygen to slow down what happens to cells as they age. Two processes related to ageing and illnesses slowed down. The scientists did tests on 35 adults over the age of 64 five times a week for three months.
A professor explained how important the research is. He says we may be able to stop cells from getting shorter. If we can do this, the cells will not age. Researchers want to make the cells longer so they do not age. The professor said young scientists want to make ageing a reversible disease."
Back to the ageing lesson.
