Life on Mars
The possibility of life on Mars is a subject of significant interest to astrobiology due to its proximity and similarities to Earth . To date, no proof has been found of past or present life on Mars. Cumulative evidence shows that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms. The existence of habitable conditions does not necessarily indicate the presence of life.
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
684579 characters 40 sections 89 paragraphs 33 images 1190 internal links 544 external links |
life 0.291 methane 0.228 organic 0.183 radiation 0.165 water 0.140 curiosity 0.139 habitability 0.137 martian 0.125 liquid 0.123 viking 0.119 microorganisms 0.119 microbial 0.118 surface 0.108 compounds 0.106 levin 0.103 |
The possibility of life on Mars is a subject of significant interest to astrobiology due to its proximity and similarities to Earth . To date, no proof has been found of past or present life on Mars. Cumulative evidence shows that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms. The existence of habitable conditions does not necessarily indicate the presence of life. |
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| 2017 |
586365 characters 39 sections 85 paragraphs 31 images 640 internal links 506 external links |
life 0.298 methane 0.205 radiation 0.157 water 0.150 habitability 0.143 organic 0.141 curiosity 0.132 martian 0.131 viking 0.125 liquid 0.124 microbial 0.124 microorganisms 0.115 levin 0.108 surface 0.106 perchlorates 0.104 |
The possibility of life on Mars is a subject of significant interest to astrobiology due to the planet's proximity and similarities to Earth . To date no proof has been found of past or present life on Mars. However, cumulative evidence is now clear that during the ancient Noachian time period, the surface environment of Mars had liquid water and may have been habitable for microorganisms. The existence of habitable conditions does not necessarily indicate the presence of life. |
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| 2016 |
538021 characters 35 sections 72 paragraphs 33 images 616 internal links 369 external links |
life 0.294 methane 0.223 organic 0.174 radiation 0.153 microorganisms 0.135 martian 0.131 water 0.131 viking 0.129 microbial 0.125 curiosity 0.122 levin 0.117 liquid 0.116 habitability 0.110 evidence 0.106 navarro 0.106 |
The possibility of life on Mars is a subject of significant interest to astrobiology due to the planet's proximity and similarities to Earth . To date no proof has been found of past or present life on Mars. However, cumulative evidence is now building that the ancient surface environment of Mars had liquid water and may have been habitable for microorganisms. The existence of habitable conditions does not necessarily indicate the presence of life. |
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| 2015 |
527385 characters 34 sections 73 paragraphs 29 images 587 internal links 356 external links |
life 0.279 methane 0.221 organic 0.179 radiation 0.152 microorganisms 0.134 meteorite 0.131 curiosity 0.128 viking 0.128 microbial 0.124 water 0.120 martian 0.118 levin 0.116 liquid 0.111 habitability 0.109 navarro 0.105 |
For centuries people have speculated about the possibility of life on Mars due to the planet's proximity and similarity to Earth . Although there has been much speculation, to date there has never been any proof of life existing on Mars . However, cumulative evidence is now building that Mars once was habitable . |
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| 2014 |
515271 characters 35 sections 75 paragraphs 27 images 584 internal links 343 external links |
life 0.283 methane 0.239 organic 0.174 radiation 0.160 viking 0.136 microorganisms 0.136 microbial 0.126 meteorite 0.125 martian 0.122 water 0.121 levin 0.118 curiosity 0.116 habitability 0.110 navarro 0.106 liquid 0.103 |
For centuries people have speculated about the possibility of life on Mars due to the planet's proximity and similarity to Earth . Although there has been much speculation, to date there has never been any absolute proof of life existing on Mars. However, cumulative evidence is now building that Mars once was habitable to life or may harbor life forms presently. |
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| 2013 |
446052 characters 32 sections 65 paragraphs 23 images 557 internal links 304 external links |
life 0.292 methane 0.249 microorganisms 0.156 radiation 0.151 levin 0.135 water 0.122 martian 0.114 liquid 0.113 organic 0.112 viking 0.112 gcms 0.108 habitability 0.106 microbial 0.104 bacteria 0.098 preterrestrial 0.096 |
For centuries people have speculated about the possibility of life on Mars due to the planet's proximity and similarity to Earth . Serious searches for evidence of life began in the 19th century, and continue via telescopic investigations and landed missions. While early work focused on phenomenology and bordered on fantasy, modern scientific inquiry has emphasized the search for water , chemical biosignatures in the soil and rocks at the planet's surface, and the search for biomarker gases in the atmosphere. [1] |
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| 2012 |
247659 characters 23 sections 51 paragraphs 18 images 434 internal links 147 external links |
life 0.336 methane 0.238 levin 0.153 microorganisms 0.147 water 0.132 preterrestrial 0.127 evidence 0.127 organic 0.117 meteorite 0.114 viking 0.109 crocco 0.107 nanobacteria 0.102 liquid 0.100 gc 0.098 microbial 0.096 |
For centuries people have speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . Serious searches for evidence of life began in the 19th century, and continue via telescopic investigations and landed missions. While early work focused on phenomenology and bordered on fantasy, modern scientific inquiry has emphasized the search for chemical biosignatures of life in the soil and rocks at the planet's surface, and the search for biomarker gases in the atmosphere. [1] Fictional Martians have been a recurring feature of popular entertainment of the 20th and 21st centuries, and it remains an open question whether life currently exists on Mars , or has existed there in the past. |
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| 2011 |
204607 characters 21 sections 47 paragraphs 18 images 408 internal links 112 external links |
life 0.319 methane 0.174 microorganisms 0.161 water 0.144 levin 0.140 preterrestrial 0.139 evidence 0.126 meteorite 0.125 viking 0.119 crocco 0.118 organic 0.116 nanobacteria 0.112 liquid 0.109 gc 0.108 biomorphs 0.104 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . Fictional Martians have been a recurring feature of popular entertainment of the 20th and 21st centuries, but it remains an open question whether life currently exists on Mars , or has existed there in the past. |
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| 2010 |
191823 characters 21 sections 46 paragraphs 17 images 398 internal links 96 external links |
life 0.328 methane 0.179 microorganisms 0.149 water 0.148 levin 0.144 preterrestrial 0.143 evidence 0.130 meteorite 0.128 viking 0.122 crocco 0.121 nanobacteria 0.115 liquid 0.112 gc 0.111 organic 0.107 biomorphs 0.107 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . Although fictional Martians have been a recurring feature of popular entertainment, it remains an open question whether life currently exists on Mars , or has existed there in the past. |
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| 2009 |
165905 characters 21 sections 41 paragraphs 17 images 286 internal links 88 external links |
life 0.356 water 0.154 preterrestrial 0.149 meteorite 0.148 microorganisms 0.138 evidence 0.128 crocco 0.126 levin 0.120 nanobacteria 0.120 methane 0.120 liquid 0.117 viking 0.116 gc 0.115 organic 0.112 biologic 0.101 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . Although fictional Martians have been a recurring feature of popular entertainment, it remains an open question whether life currently exists on Mars , or has existed there in the past. |
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| 2008 |
135363 characters 17 sections 39 paragraphs 15 images 274 internal links 67 external links |
life 0.343 preterrestrial 0.153 viking 0.143 microorganisms 0.142 meteorite 0.137 crocco 0.129 levin 0.123 nanobacteria 0.123 gc 0.118 evidence 0.118 organic 0.115 water 0.113 methane 0.109 biologic 0.103 gonzález 0.097 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . Although fictional Martians have been a recurring feature of popular entertainment, it remains an open question whether life currently exists on Mars , or has existed there in the past. The range of opinions spans a broad spectrum from those who believe that the conditions on Mars make life impossible, to those who accept life on Mars as a demonstrated fact. |
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| 2007 |
56754 characters 16 sections 28 paragraphs 4 images 109 internal links 32 external links |
life 0.365 viking 0.184 regolith 0.176 pfs 0.166 water 0.134 ammonia 0.122 squyres 0.111 peroxide 0.109 oxidants 0.109 stoker 0.108 scientist 0.099 silica 0.097 liquid 0.096 microbial 0.093 canals 0.091 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . It remains an open question whether life exists on Mars now, or existed there in the past. |
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| 2006 |
34512 characters 9 sections 16 paragraphs 4 images 83 internal links 25 external links |
life 0.296 pfs 0.255 ammonia 0.187 canals 0.140 skeptical 0.139 liquid 0.129 methane 0.118 speculation 0.117 fourier 0.111 water 0.107 scientists 0.107 oceans 0.106 findings 0.106 evidence 0.105 knew 0.099 |
Scientists have long speculated about the possibility of life on Mars owing to the planet's proximity and similarity to Earth . It remains an open question whether life exists on Mars now, or existed there in the past. |
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| 2005 |
19232 characters 6 sections 13 paragraphs 2 images 55 internal links 14 external links |
life 0.302 stoker 0.239 scientists 0.192 methane 0.171 lemke 0.159 michelson 0.144 knew 0.144 findings 0.136 canals 0.135 2005 0.126 claims 0.107 oceans 0.103 conference 0.102 belief 0.099 century 0.093 |
Scientists have long speculated about the possibility of life on Mars due to that planet's proximity and similarity to Earth . It remains an open question whether life exists on Mars now, or existed there in the past. |
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| 2004 |
10490 characters 4 sections 9 paragraphs 0 images 36 internal links 3 external links |
life 0.283 knew 0.197 canals 0.185 oceans 0.141 planet 0.121 dr 0.117 methane 0.117 shrank 0.109 harshest 0.109 fleeing 0.109 whewell 0.109 courtney 0.109 theologians 0.109 probe 0.108 microbes 0.107 |
Scientists, philosophers and theologians have long speculated about the possibility of life on Mars, due to that planet's proximity and similarity to Earth . While there appears to be no life on the planet now, it remains a scientifically open question whether life existed there in the past. |