Do You Know?

1. Do we *really* need vitamins?
2. Why are colds more common in winter ?
3. Why cannot aeroplanes fly faster than they do ? 
4. All life must end eventually. How will life end on Earth?
5. I saw a film of a scuba diver swimming under water. What would happen if a scuba diver was swallowed by a whale?
6. I have seen beautiful pictures of red leaves in autumn. Why do leaves turn red in autumn? For answer, see article on Page 27.