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Susan Doris Wrote:
-------------------------------------------------------
>
Quote

That's almost all the way to the birth of
> the solar system.
>
> If life arose that early on a molten lava Earth,
> it really can't be that hard for it to get going.
> So IMO the authors aren't really going out on a
> limb to suggest that life may be common.
> One of the things Prof Brian Cox mentions often is
> the fact thatEarth has an atmosphere which, as far
> as I understand, is almost certainly necessary for
> any conditions to lastlong enough for any advanced
> life to evolve.
>
> Susan

Maybe, maybe not. However, life itself created that oxygen atmosphere as a byproduct of photosynthesis. The early Earth had none, so when the O2 levels rose, all of the organisms not adapted to it were killed off.

That would have been most of them. Others went underground or migrated to other anoxic and anaerobic conditions where they survive to this day.

In the spring, at the end of the day, you should smell like earth. ~ Margaret Atwood

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Subject Views Written By Posted
Life in the universe probably common 2272 Aine 20-Dec-17 13:29
Re: Life in the universe probably common 438 Susan Doris 20-Dec-17 15:14
Re: Life in the universe probably common 396 D-Archer 20-Dec-17 16:17
Re: Life in the universe probably common 422 Aine 21-Dec-17 01:08
Re: Life in the universe probably common 454 D-Archer 21-Dec-17 10:54
Re: Life in the universe probably common 365 Archaic 27-Dec-17 03:43
Re: Life in the universe probably common 341 Eddie Larry 27-Dec-17 22:05
Re: Life in the universe probably common 334 Archaic 29-Dec-17 23:39
Re: Life in the universe probably common 358 Eddie Larry 30-Dec-17 05:30
Re: Life in the universe probably common 250 gulsbo 27-May-18 14:36
Re: Life in the universe probably common 215 D-Archer 28-May-18 10:30
Re: Life in the universe probably common 229 gulsbo 29-May-18 16:37
Re: Life in the universe probably common 210 D-Archer 29-May-18 17:32
Re: Life in the universe probably common 212 gulsbo 29-May-18 20:01
Re: Life in the universe probably common 212 D-Archer 30-May-18 09:43
Re: Life in the universe probably common 218 gulsbo 30-May-18 16:03
Re: Life in the universe probably common 219 gulsbo 30-May-18 16:28
Re: Life in the universe probably common 207 D-Archer 31-May-18 09:32
Re: Life in the universe probably common 217 gulsbo 11-Jun-18 06:07
Re: Life in the universe probably common 337 drrayeye 21-Dec-17 00:34
but Feynman's opinion is suspect after all...no? 359 Racho 21-Dec-17 00:49
Re: but Feynman's opinion is suspect after all...no? 376 Aine 21-Dec-17 01:07
Re: Life in the universe probably common 331 Aine 21-Dec-17 01:06
Re: Life in the universe probably common 326 drrayeye 21-Dec-17 14:06
Re: Life in the universe probably common 353 Aine 21-Dec-17 15:50
Re: Life in the universe probably common 323 D-Archer 21-Dec-17 16:06
Re: Life in the universe probably common 345 Aine 21-Dec-17 16:27
Re: Life in the universe probably common 419 D-Archer 21-Dec-17 18:54
Re: Life in the universe probably common 349 Aine 21-Dec-17 21:35
Re: Life in the universe probably common 314 D-Archer 22-Dec-17 08:51
Re: Life in the universe probably common 328 Aine 22-Dec-17 17:04
Re: Life in the universe probably common 325 D-Archer 23-Dec-17 11:11
Re: Life in the universe probably common 362 cladking 26-Dec-17 01:08
Re: Life in the universe probably common 289 Aine 26-Dec-17 17:34
Re: Life in the universe probably common 318 cladking 26-Dec-17 22:26
Re: Life in the universe probably common 203 jeffreyw 29-May-18 20:34
Re: Life in the universe probably common 218 gulsbo 30-May-18 19:29
Re: Life in the universe probably common 320 Susan Doris 21-Dec-17 16:10
Re: Life in the universe probably common 346 Aine 21-Dec-17 16:25
Re: Life in the universe probably common 323 Vanya 21-Dec-17 18:45
Re: Life in the universe probably common 325 D-Archer 21-Dec-17 16:03
Re: Life in the universe probably common 342 drrayeye 21-Dec-17 19:17
Re: Life in the universe probably common 374 D-Archer 22-Dec-17 08:56
Ingredients for Life Revealed in Meteorites That Fell to Earth 296 brett z 11-Jan-18 00:21
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 287 Aine 11-Jan-18 14:23
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 218 brett z 11-Jan-18 23:07
Blue sky thinking 280 drrayeye 11-Jan-18 18:29
Re: Blue sky thinking 262 Aine 11-Jan-18 18:55
Re: Blue sky thinking 279 drrayeye 11-Jan-18 19:24
Re: Blue sky thinking 288 Aine 11-Jan-18 19:36
Re: Blue sky thinking 292 drrayeye 11-Jan-18 22:05
Re: Blue sky thinking 288 carolb 11-Jan-18 21:14
Re: Blue sky thinking 311 brett z 11-Jan-18 23:04
Re: Blue sky thinking 320 drrayeye 11-Jan-18 23:44
Re: Blue sky thinking 282 brett z 11-Jan-18 23:55
Re: Blue sky thinking 261 drrayeye 12-Jan-18 03:19
I don't agree with your comparison 266 brett z 12-Jan-18 05:18
Maybe you misinterpreted 290 drrayeye 12-Jan-18 09:16
no, maybe you misinterpreted 289 brett z 13-Jan-18 23:24
Re: no, maybe you misinterpreted 258 Aine 14-Jan-18 00:18
Stuart Wolpert 244 drrayeye 14-Jan-18 08:10
Re: Stuart Wolpert 393 brett z 14-Jan-18 09:29
Re: Blue sky thinking 254 D-Archer 24-May-18 07:35
Life Paradigm 226 D-Archer 24-May-18 07:20
Re: Life Paradigm 262 gulsbo 26-May-18 19:02
Re: Life Paradigm 218 D-Archer 27-May-18 10:29
Re: Life in the universe probably common 242 gulsbo 26-May-18 17:38
Re: Life in the universe probably common 220 D-Archer 27-May-18 10:30
Re: Life in the universe probably common 220 gulsbo 30-May-18 19:31
Re: Life in the universe probably common 202 D-Archer 31-May-18 09:35
Re: Life in the universe probably common 308 gulsbo 31-May-18 17:47
Life Paradigm - synopsis 249 D-Archer 05-Jun-18 12:12
Re: Life Paradigm - synopsis 230 gulsbo 12-Jun-18 12:26
Re: Life Paradigm - synopsis 200 D-Archer 14-Jun-18 10:10
Re: Life Paradigm - synopsis 229 gulsbo 14-Jun-18 15:34
Re: Life Paradigm - synopsis 206 jeffreyw 14-Jun-18 17:47
Re: Life Paradigm - synopsis 410 D-Archer 15-Jun-18 12:05


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