One of the most amazing things about the human mind is our ability to imagine the future. In our 1we can see what has not yet happened. For example, while we are looking forward to visiting a new place or country, we 2what it will be like. We predict (预测) the places of interest and the 3 people will eat, dress and act. Of c0ourse, we do not always predict the things 4 Sometimes things are very different from what we imagine them to be.

Humans also use their minds to think in their dreams. One of the most 5dreams in history is the dream of the German scientist, Kekule, who had been trying to work out a very 6 problem in physics. He had studied the problem for weeks, but it seemed as if there was no way of 7 the answer. Then one night he went to bed and had a dream. When he woke up, he8that he knew the answer because he had solved the problem in his dream. How9 it was!

Some scientists wanted to study how it worked. They used certain machines to study Kekule's brain after he fell asleep. They did some10 but were not able to find out the truth.