According to the best evidence gath

According to the best evidence gathered by space probes and astronomers, Mars is an inhospitable planet, more similar to Earth’s Moon than to Earth it self – a dry , stark , seemingly lifeless world. Mars’ air pressure is equal to Earth’s at an altitude of 100,000 feet. The air there is 95 percent carbon dioxide.
Mars has no ozone layer to screen out the sun’s lethal radiation.Daytime temperatures may reach above freezing, but because the planet is blanketed by the mere wisp of an atmostphere, the heat radiates back into space . Even at the equator, the temperature drops to -50C ( -60F ) at night.Today there is no liquid water, although valleys and chnnels on the surface show evidence of having been carved by running water. The polar ice caps are made of frozen water and carbon dioxide , and water may be frozen in the ground as permafrost.
Despite these difficult conditions, certain scientists believe that there is a possibility of trans-forming Mars into a more Earth-like planet. Nuclear reactors might be used to melt frozen gases and eventually build up the atmostphere. This in turn could create a “ greenhouse effect ” that would stop heat from radiating back into space. Liquid water could be thawed to from a polar ocean. Once enough ice has melted, suitable plants could be introduced to build up the level of oxygen in the atmostphere so that, in time, the planet would support animal life from Earth and even permanent human colonies. “ This was once thought to be so far in the future as to be irrelevant,” said Christopher Mckay, a research scientist at NASA . “ But now it’s starting to look practical. We could begin word in four or five decades.”
The idea of “ terra-forming” Mars, as enthusiasts call it, has its roots in science fiction. But as researchers develop a more profound understanding of how Earth's ecology supports life, they have begun to see how it may be pssible to create similar conditions on mars

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Theo các bằng chứng tốt nhất thu thập bằng đầu dò không gian và nhà thiên văn học, sao Hỏa là một hành tinh khắc nghiệt, hơn tương tự như mặt trăng của trái đất hơn để trái đất nó tự-giặt, ngay đơ, thế giới dường như không hoạt động. Mars' máy áp suất là tương đương với trái đất ở độ cao 100.000 feet. Không khí đó là 95 phần trăm lượng khí carbon dioxide. Mars đã không có tầng ôzôn để bức xạ mặt trời gây chết người trên màn hình. Nhiệt độ ban ngày có thể đạt được trên đóng băng, nhưng bởi vì các hành tinh được bao phủ bởi wisp atmostphere một, chỉ, nhiệt bức xạ trở lại vào không gian. Ngay cả ở xích đạo, nhiệt độ xuống tới-50C (-60F) vào ban đêm. Hôm nay có là không có nước lỏng, mặc dù Thung lũng và chnnels trên bề mặt cho bằng chứng có được chạm khắc bằng cách chạy nước. Chỏm băng vùng cực được làm bằng nước đông lạnh và khí carbon dioxide và nước có thể được đông lạnh ở mặt đất như băng giá vĩnh cửu. Despite these difficult conditions, certain scientists believe that there is a possibility of trans-forming Mars into a more Earth-like planet. Nuclear reactors might be used to melt frozen gases and eventually build up the atmostphere. This in turn could create a “ greenhouse effect ” that would stop heat from radiating back into space. Liquid water could be thawed to from a polar ocean. Once enough ice has melted, suitable plants could be introduced to build up the level of oxygen in the atmostphere so that, in time, the planet would support animal life from Earth and even permanent human colonies. “ This was once thought to be so far in the future as to be irrelevant,” said Christopher Mckay, a research scientist at NASA . “ But now it’s starting to look practical. We could begin word in four or five decades.” The idea of “ terra-forming” Mars, as enthusiasts call it, has its roots in science fiction. But as researchers develop a more profound understanding of how Earth's ecology supports life, they have begun to see how it may be pssible to create similar conditions on mars