For decades, astronomers searching for life beyond humanity's home planet have had a simple strategy: follow the water. Water is the sine qua non of terrestrial life and as thousands of new planets ...

媒体英语会带大家一起学习 BBC 撰稿人在报道世界大事时常用到的单词和短语。 Professor Stephen Hawking has previously said: "I don't think the human race will survive the next thousand years, unless we spread into space." Scientists have ...