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found strong evidence of liquid water on mars and means life could exist on the red planet and john hendron. >> reporter: nasa scientists say the red planet is not the desolate, dry place they long thought it was. >> today we are revolutionizing this planet and rovers are finding there is a lot more humidity in the air than we imagine as we ingest the soils they are moist and hydrated, full of water. mars is not the dry arid planet we thought of in the past. today we are going to announce that under certain circumstances liquid water has been found on mars. >> reporter: researchers say a few billion years ago mars was covered with rivers lakes and oceans where a small amount of frozen water remained and nasa says it shows water on the planet, a basic building block of life and say there is a water cycle that changes over the course of a year much like the water cycle on earth. >> these are dark streaks that form in late spring, grow through the summer and then disappear by fall. >> reporter: that raises the possibility of life possibly microbe life and makes it easier for explorers to susta
found strong evidence of liquid water on mars and means life could exist on the red planet and john hendron. >> reporter: nasa scientists say the red planet is not the desolate, dry place they long thought it was. >> today we are revolutionizing this planet and rovers are finding there is a lot more humidity in the air than we imagine as we ingest the soils they are moist and hydrated, full of water. mars is not the dry arid planet we thought of in the past. today we are going to...
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discovery raises the possibility that microbes could also be present or in simple language life, john hendron reporter: nasa scientists say the red planet is not the desolate, dry place they once thought it was. >> today we are revenue -- revolutionizing the planet and there is more humidity in the air and the soils are moist and hydrated and full of water. mars is not the dry, arid planet we thought of in the past. today we are going to announce that under certain circumstances liquid water has been found on mars. >> reporter: researchers say a few billion years ago mars was covered with rivers, lakes and possibly an ocean but they believed only a small amount of frozen water remained and now nasa says a camera on the mars orbiter captured streaks of water on the surface of the red planet, a basic building block of life and they say there is a water cycle that changes over the course of the year, much like the water cycle on earth. >> these are dark streaks that form in late spring, grow through the summer and then disappear by fall. >> reporter: that raises the possibility of life, possibly
discovery raises the possibility that microbes could also be present or in simple language life, john hendron reporter: nasa scientists say the red planet is not the desolate, dry place they once thought it was. >> today we are revenue -- revolutionizing the planet and there is more humidity in the air and the soils are moist and hydrated and full of water. mars is not the dry, arid planet we thought of in the past. today we are going to announce that under certain circumstances liquid...
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john hendron, arrests. >> michael sharra is the curateo in new york.e explains why it has been so difficult to prove that there is water on mars. >> we don't have identify yes from mars. we only have still images. you need to compare images taken day i see, weeks, months apart. most of the time, 99.999% of the time, you don't see any changes. you have to look through huge amounts of information before you find those tell-it witale d streaks. it takes years to figure out how to analyze them. there was only one instrument orbiting mars trying to do that may analysis. >> shara says humans have to drill on the surface of mars to know if life can survive. >> daily debut, a new host at the helm of "the daily show." >> new study finds a type of genetic testing can tell doctors which patients with early stage breast cancer need chemotherapy. it analyzes 21 genes. patients who fell into the test's low risk category were given hormone blocking drugs instead of chemotherapy. of that group, 99% did not develop met a static breast cancer five years after surgery. t
john hendron, arrests. >> michael sharra is the curateo in new york.e explains why it has been so difficult to prove that there is water on mars. >> we don't have identify yes from mars. we only have still images. you need to compare images taken day i see, weeks, months apart. most of the time, 99.999% of the time, you don't see any changes. you have to look through huge amounts of information before you find those tell-it witale d streaks. it takes years to figure out how to...
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john hendron reports. why were nasa scientists say the red planet is not the desolate, dry place they long thought it was. >> today we're revolutionizing our understanding of this planet. our rovers are finding that there's a lot more humidity in the air than we ever imagined. we ingest the soils, and they're moist. they're hydrated and full of water. mars is not the dry, arid planet that we thought of in the past. today we're going to announce that under certain circumstances liquid water has been found on mars. >> researchers say a few billion years ago mars was covered with rivers, lakes and possibly an ocean, but they believed only a small amount of frozen water remained. now nasa says a camera on the mars reconnaissance orbiter saw flows on the red planet, a basic building block of life. they say a water cycle changes over the course of the year like the water cycle on earth. >> they form in late spring, grow through the summer and disappear by fall. >> that raises the possibility of life, possibly mi
john hendron reports. why were nasa scientists say the red planet is not the desolate, dry place they long thought it was. >> today we're revolutionizing our understanding of this planet. our rovers are finding that there's a lot more humidity in the air than we ever imagined. we ingest the soils, and they're moist. they're hydrated and full of water. mars is not the dry, arid planet that we thought of in the past. today we're going to announce that under certain circumstances liquid...