User talk:Rowan Forest

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Sincerely,

RMaung (WMF) 20:39, 3 October 2019 (UTC)

ET Status report?

If interested - Latest comments re ET by astronomer Seth Shostak - Enjoy! :) Drbogdan (talk) 22:21, 5 October 2019 (UTC)

@Drbogdan: I think this is part of the astrobiology PR regarding ExoMars rover and NASA's 2020 rover. They are focused on biosignatures at the surface, which has not been done since the Viking landers in the 1970s so it is great and will certainly engage a lot of people. But I doubt we are any closer at discovering biosignatures since the surface has not changed since the Viking program and it remains extremely hostile in chemistry, dryness, low pressure, radiation and temperature. Past chemical biosignatures must be long gone, but I hope not if they look >5-7 m deep in lake sediments (as compared to 2 m for ExoMars rover). Otherwise I think the best they will get at the surface will have to be bioforms (fossilized inorganic shapes) - which at microscopic level are not enough to make the call. IMO, science missions will have to look at the deep subsurface (underground, under the ice caps, or inside deep caves), or at least land a payload that can actually sample the methane isotopes in the atmosphere -which is NOT currently planned for any rover or lander in the near or long term. I predict that these 2 rovers will come up empty handed, so SpaceX will use that fact to justify landing non-sterile equipment and eventually humans. Rowan Forest (talk) 22:45, 5 October 2019 (UTC)

@Rowan Forest: Thank you for your reply - your comments describe the current status of the search for ET *very well* IMO - I *entirely* agree with nearly everything you've noted - Thanks again for your comments - they're all *greatly* appreciated - Enjoy! :) Drbogdan (talk) 23:24, 5 October 2019 (UTC)

References

Please comment on Template talk:Infobox military unit

Hi... Could you please be participating in request for comment on Template talk:Infobox military unit. (Ckfasdf (talk) 07:12, 7 October 2019 (UTC))

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