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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 2302 Aine 20-Dec-17 13:29
Re: Life in the universe probably common 449 Susan Doris 20-Dec-17 15:14
Re: Life in the universe probably common 405 D-Archer 20-Dec-17 16:17
Re: Life in the universe probably common 433 Aine 21-Dec-17 01:08
Re: Life in the universe probably common 460 D-Archer 21-Dec-17 10:54
Re: Life in the universe probably common 373 Archaic 27-Dec-17 03:43
Re: Life in the universe probably common 348 Eddie Larry 27-Dec-17 22:05
Re: Life in the universe probably common 340 Archaic 29-Dec-17 23:39
Re: Life in the universe probably common 367 Eddie Larry 30-Dec-17 05:30
Re: Life in the universe probably common 268 gulsbo 27-May-18 14:36
Re: Life in the universe probably common 221 D-Archer 28-May-18 10:30
Re: Life in the universe probably common 244 gulsbo 29-May-18 16:37
Re: Life in the universe probably common 219 D-Archer 29-May-18 17:32
Re: Life in the universe probably common 226 gulsbo 29-May-18 20:01
Re: Life in the universe probably common 220 D-Archer 30-May-18 09:43
Re: Life in the universe probably common 232 gulsbo 30-May-18 16:03
Re: Life in the universe probably common 234 gulsbo 30-May-18 16:28
Re: Life in the universe probably common 214 D-Archer 31-May-18 09:32
Re: Life in the universe probably common 232 gulsbo 11-Jun-18 06:07
Re: Life in the universe probably common 346 drrayeye 21-Dec-17 00:34
but Feynman's opinion is suspect after all...no? 372 Racho 21-Dec-17 00:49
Re: but Feynman's opinion is suspect after all...no? 384 Aine 21-Dec-17 01:07
Re: Life in the universe probably common 339 Aine 21-Dec-17 01:06
Re: Life in the universe probably common 336 drrayeye 21-Dec-17 14:06
Re: Life in the universe probably common 360 Aine 21-Dec-17 15:50
Re: Life in the universe probably common 332 D-Archer 21-Dec-17 16:06
Re: Life in the universe probably common 355 Aine 21-Dec-17 16:27
Re: Life in the universe probably common 431 D-Archer 21-Dec-17 18:54
Re: Life in the universe probably common 357 Aine 21-Dec-17 21:35
Re: Life in the universe probably common 321 D-Archer 22-Dec-17 08:51
Re: Life in the universe probably common 336 Aine 22-Dec-17 17:04
Re: Life in the universe probably common 332 D-Archer 23-Dec-17 11:11
Re: Life in the universe probably common 369 cladking 26-Dec-17 01:08
Re: Life in the universe probably common 296 Aine 26-Dec-17 17:34
Re: Life in the universe probably common 326 cladking 26-Dec-17 22:26
Re: Life in the universe probably common 210 jeffreyw 29-May-18 20:34
Re: Life in the universe probably common 235 gulsbo 30-May-18 19:29
Re: Life in the universe probably common 327 Susan Doris 21-Dec-17 16:10
Re: Life in the universe probably common 355 Aine 21-Dec-17 16:25
Re: Life in the universe probably common 331 Vanya 21-Dec-17 18:45
Re: Life in the universe probably common 332 D-Archer 21-Dec-17 16:03
Re: Life in the universe probably common 352 drrayeye 21-Dec-17 19:17
Re: Life in the universe probably common 386 D-Archer 22-Dec-17 08:56
Ingredients for Life Revealed in Meteorites That Fell to Earth 303 brett z 11-Jan-18 00:21
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 294 Aine 11-Jan-18 14:23
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 224 brett z 11-Jan-18 23:07
Blue sky thinking 288 drrayeye 11-Jan-18 18:29
Re: Blue sky thinking 270 Aine 11-Jan-18 18:55
Re: Blue sky thinking 285 drrayeye 11-Jan-18 19:24
Re: Blue sky thinking 295 Aine 11-Jan-18 19:36
Re: Blue sky thinking 301 drrayeye 11-Jan-18 22:05
Re: Blue sky thinking 297 carolb 11-Jan-18 21:14
Re: Blue sky thinking 323 brett z 11-Jan-18 23:04
Re: Blue sky thinking 329 drrayeye 11-Jan-18 23:44
Re: Blue sky thinking 289 brett z 11-Jan-18 23:55
Re: Blue sky thinking 267 drrayeye 12-Jan-18 03:19
I don't agree with your comparison 273 brett z 12-Jan-18 05:18
Maybe you misinterpreted 300 drrayeye 12-Jan-18 09:16
no, maybe you misinterpreted 303 brett z 13-Jan-18 23:24
Re: no, maybe you misinterpreted 265 Aine 14-Jan-18 00:18
Stuart Wolpert 253 drrayeye 14-Jan-18 08:10
Re: Stuart Wolpert 401 brett z 14-Jan-18 09:29
Re: Blue sky thinking 265 D-Archer 24-May-18 07:35
Life Paradigm 233 D-Archer 24-May-18 07:20
Re: Life Paradigm 282 gulsbo 26-May-18 19:02
Re: Life Paradigm 226 D-Archer 27-May-18 10:29
Re: Life in the universe probably common 256 gulsbo 26-May-18 17:38
Re: Life in the universe probably common 230 D-Archer 27-May-18 10:30
Re: Life in the universe probably common 235 gulsbo 30-May-18 19:31
Re: Life in the universe probably common 209 D-Archer 31-May-18 09:35
Re: Life in the universe probably common 327 gulsbo 31-May-18 17:47
Life Paradigm - synopsis 256 D-Archer 05-Jun-18 12:12
Re: Life Paradigm - synopsis 245 gulsbo 12-Jun-18 12:26
Re: Life Paradigm - synopsis 207 D-Archer 14-Jun-18 10:10
Re: Life Paradigm - synopsis 244 gulsbo 14-Jun-18 15:34
Re: Life Paradigm - synopsis 213 jeffreyw 14-Jun-18 17:47
Re: Life Paradigm - synopsis 418 D-Archer 15-Jun-18 12:05


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