(36)
.Astronauts who are
(37)
to go there in the next decade may find plenty
(38)
water to slake (消除) their thirst.And with water present the
(39)
of finding some sort of life of Mars are
(40)
brighter.
This is the view of forty geologists who have been analyzing
(41)
of pictures and other scientific
(42)
obtained by robot explorers in the sixties and seventies.
To begin with, scientists thought the Red planet was as
(43)
as the Moon
(44)
dust storms swirling over vast sandy
(45)
.But now the picture is very different
(46)
mountains and valleys carved by
(47)
glaciers and rivers rushing and rumbling deep underground.
In a report on the analysis of the Martian pictures Dr.Michael Car of the U.S.Geological Survey comments: “I am convinced
(48)
lots of water on Mars.” Any surface water will be in the
(49)
of ice.But it could save explorers from
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