Right now, all over the world, people are using energy. As we drive our cars, work on our computers, or even cook food on a wood fire, we probably do not stop to think about where the energy comes from. But when the gas is gone and there is no more coal – what then? Scientists are finding new answers all the time. Get ready for the children whose running feet make the energy to bring water to their village; for the power station that uses warm and cold water to make energy; for the car that...
A level 3 Oxford Bookworms Library graded reader. Written for Learners of English by Alex Raynham. You are fast asleep, and nothing is happening. Or is it? In fact, your body is hard at work. Your lungs are taking oxygen from the air, and your heart is pumping blood round your body. Millions of pieces of information are travelling backwards and forwards to your brain all the time. Muscles are repairing themselves, and in your lymph nodes special cells are cleaning germs and waste from the...
A level 2 Oxford Bookworms Library graded reader. Written for Learners of English by Alex Raynham. What does the world look like from the moon?' 'How do our bodies work?' 'Is it possible for people to fly?' 'Can I make a horse of bronze that is 8 metres tall?' 'How can we have cleaner cities?' All his life, Leonardo da Vinci asked questions. We know him as a great artist, but he was one of the great thinkers of all time, and even today, doctors and scientists are still learning from his ideas....
