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's engaging some of the greatest minds in science. As our knowledge of the universe has increased, we're getting closer to answers. Many scientists...
本站所有视频和图片均来自互联网收集而来,版权归原创者所有,本网站只提供web页面服务,并不提供资源存储,也不参与录制、上传。