Is there life on Mars?(2)
2023-05-30 来源:百合文库
The question nevertheless remains: given that the conditions needed for life to emerge on Earth also seem to have pertained for a time on Mars, might life have evolved there, too? And, if it did, might it still survive in some form, even if only in vanishingly rare amounts?
On July 30th NASA, America’s space agency, hopes to launch its latest Mars rover, Perseverance, which will try to answer at least the first of those questions. It is aimed at a 45km-wide crater called Jezero that was, 3.5bn years ago, home to a lake. Its main goal is to look for signs of ancient life. But it is also the opening gambit in a decade-long plan to bring Martian rocks to Earth. Nor will Perseverance be alone in its quest. It will be accompanied either now or soon by European, Chinese and other robots intent on finding out just what it was that happened on Mars.
Once upon a time...
One such mission is already on its way. On July 20th the United Arab Emirates (UAE) joined the list of countries that have launched probes towards extraterrestrial bodies. That was when Al Amal, meaning “hope”, rose from Japan’s spaceport on Tanegashima, off the southern tip of Kyushu. Al Amal’s purpose is to study Mars’s weather and also how the Martian atmosphere is leaking into space.
On July 30th NASA, America’s space agency, hopes to launch its latest Mars rover, Perseverance, which will try to answer at least the first of those questions. It is aimed at a 45km-wide crater called Jezero that was, 3.5bn years ago, home to a lake. Its main goal is to look for signs of ancient life. But it is also the opening gambit in a decade-long plan to bring Martian rocks to Earth. Nor will Perseverance be alone in its quest. It will be accompanied either now or soon by European, Chinese and other robots intent on finding out just what it was that happened on Mars.
Once upon a time...
One such mission is already on its way. On July 20th the United Arab Emirates (UAE) joined the list of countries that have launched probes towards extraterrestrial bodies. That was when Al Amal, meaning “hope”, rose from Japan’s spaceport on Tanegashima, off the southern tip of Kyushu. Al Amal’s purpose is to study Mars’s weather and also how the Martian atmosphere is leaking into space.
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