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Life on Earth can be found almost everywhere. Possible traces using isotopes of carbon turn up clues of methane probably produced by life:- http://www.livescience.com/48447-deepest-life-methane-clues.html?cmpid=558414

Complete thread:

New Extremeophiles David Turell 2011-06-03, 02:25 PM
- New Extremeophiles David Turell 2011-07-06, 12:48 AM
  - New Extremeophiles: Antarctica David Turell 2013-02-14, 11:01 PM
- New Extremeophiles David Turell 2013-04-05, 06:36 PM
  - New Extremeophiles David Turell 2013-10-10, 07:26 PM
    - New Extremeophiles: early life David Turell 2014-10-25, 02:10 PM
      - New Extremeophiles: live on sulfates David Turell 2015-01-17, 02:21 PM
        
        New Extremeophiles: 13,000 feet deep in Pacific David Turell 2016-12-21, 02:57 PM
        
        New Extremeophiles: living on electrons David Turell 2016-12-31, 01:25 AM
        
        New Extremeophiles: living on electrons dhw 2016-12-31, 01:09 PM
        
        New Extremeophiles: living on electrons David Turell 2016-12-31, 03:35 PM
        
        New Extremeophiles: four examples David Turell 2017-06-05, 01:29 PM
        
        New Extremeophiles: four examples dhw 2017-06-06, 01:48 PM
        
        New Extremeophiles: four examples David Turell 2017-06-06, 04:24 PM
        
        New Extremophiles: possible means of evolution David Turell 2018-01-30, 03:50 PM
        
        New Extremeophiles: antarctic insects David Turell 2020-04-15, 09:54 PM
        
        New Extremophiles: under antarctic ice in lakes David Turell 2020-07-20, 05:33 PM
        
        New Extremophiles: Arctic snails! David Turell 2020-07-21, 12:20 AM
        
        New Extremophiles: Arctic snails! dhw 2020-07-21, 11:53 AM
        
        New Extremophiles: Arctic snails! David Turell 2020-07-21, 02:00 PM
        
        New Extremeophiles: living on electrons David Turell 2017-09-08, 09:04 PM
        
        New Extremophiles: living by expelling electrons to rocks David Turell 2018-03-31, 12:51 AM
        
        New Extremophiles: living in lakes under miles of ice David Turell 2019-01-16, 04:13 AM
        
        Old Extremophiles: using arsenic for energy David Turell 2019-05-05, 12:44 AM
        
        Old Extremophiles: using arsenic for energy David Turell 2021-01-01, 03:31 PM
        
        New Extremophiles: ocean floor three kilometers down David Turell 2020-03-06, 08:10 PM
        
        New Extremophiles: ocean floor three kilometers down David Turell 2020-04-02, 11:52 PM
        
        Useful Extremeophiles: living on hydrogen David Turell 2020-04-05, 06:28 PM
        
        New Extremeophiles: living at extreme heat David Turell 2020-12-06, 12:15 AM
        
        New Extremeophiles: living under glaciers David Turell 2020-12-22, 07:05 PM
        
        New Extremophiles: living in lava tubes David Turell 2021-07-28, 02:39 PM
        
        New Extremophiles: living under Antarctic ice David Turell 2021-12-20, 07:35 PM
        
        New Extremophiles: ocean bottom dwellers make own oxygen David Turell 2022-01-12, 12:18 AM
        
        New Extremophiles: so many ocean bottom dwellers David Turell 2022-02-06, 03:09 PM
        
        New Extremophiles: so many ocean bottom dwellers dhw 2022-02-07, 07:23 AM
        
        New Extremophiles: a few more David Turell 2022-06-06, 01:52 PM
        
        New Extremophiles: crustal grit David Turell 2023-07-12, 06:48 PM
        
        New Extremophiles: dark ocean dwellers David Turell 2023-07-15, 12:09 PM
        
        New Extremophiles: sopping up water in a desert David Turell 2023-10-30, 07:35 PM
        
        New Extremophiles: bacteria living on phosphorus. David Turell 2023-11-12, 06:03 PM
        
        New Extremophiles: more in deep sea crevices David Turell 2024-10-15, 07:20 PM
        
        New Extremophiles: through Arctic night period. David Turell 2025-01-29, 06:12 PM