外星人大猜想

<p>The hunt for aliens is on! After a distinguished career in cosmology Professor Martin Rees, the astronomer royal, has taken up the search for extra-terrestrials. Looking for aliens is no longer science fiction - it is a question that&#39;s engaging some of the greatest minds in science.
　　As our knowledge of the universe has increased, we&#39;re getting closer to answers. Many scientists...</p>