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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 2263 Aine 20-Dec-17 13:29
Re: Life in the universe probably common 428 Susan Doris 20-Dec-17 15:14
Re: Life in the universe probably common 389 D-Archer 20-Dec-17 16:17
Re: Life in the universe probably common 415 Aine 21-Dec-17 01:08
Re: Life in the universe probably common 448 D-Archer 21-Dec-17 10:54
Re: Life in the universe probably common 360 Archaic 27-Dec-17 03:43
Re: Life in the universe probably common 336 Eddie Larry 27-Dec-17 22:05
Re: Life in the universe probably common 325 Archaic 29-Dec-17 23:39
Re: Life in the universe probably common 347 Eddie Larry 30-Dec-17 05:30
Re: Life in the universe probably common 242 gulsbo 27-May-18 14:36
Re: Life in the universe probably common 210 D-Archer 28-May-18 10:30
Re: Life in the universe probably common 222 gulsbo 29-May-18 16:37
Re: Life in the universe probably common 206 D-Archer 29-May-18 17:32
Re: Life in the universe probably common 203 gulsbo 29-May-18 20:01
Re: Life in the universe probably common 208 D-Archer 30-May-18 09:43
Re: Life in the universe probably common 209 gulsbo 30-May-18 16:03
Re: Life in the universe probably common 209 gulsbo 30-May-18 16:28
Re: Life in the universe probably common 202 D-Archer 31-May-18 09:32
Re: Life in the universe probably common 207 gulsbo 11-Jun-18 06:07
Re: Life in the universe probably common 329 drrayeye 21-Dec-17 00:34
but Feynman's opinion is suspect after all...no? 355 Racho 21-Dec-17 00:49
Re: but Feynman's opinion is suspect after all...no? 370 Aine 21-Dec-17 01:07
Re: Life in the universe probably common 326 Aine 21-Dec-17 01:06
Re: Life in the universe probably common 320 drrayeye 21-Dec-17 14:06
Re: Life in the universe probably common 345 Aine 21-Dec-17 15:50
Re: Life in the universe probably common 315 D-Archer 21-Dec-17 16:06
Re: Life in the universe probably common 325 Aine 21-Dec-17 16:27
Re: Life in the universe probably common 397 D-Archer 21-Dec-17 18:54
Re: Life in the universe probably common 334 Aine 21-Dec-17 21:35
Re: Life in the universe probably common 306 D-Archer 22-Dec-17 08:51
Re: Life in the universe probably common 321 Aine 22-Dec-17 17:04
Re: Life in the universe probably common 314 D-Archer 23-Dec-17 11:11
Re: Life in the universe probably common 355 cladking 26-Dec-17 01:08
Re: Life in the universe probably common 283 Aine 26-Dec-17 17:34
Re: Life in the universe probably common 314 cladking 26-Dec-17 22:26
Re: Life in the universe probably common 198 jeffreyw 29-May-18 20:34
Re: Life in the universe probably common 211 gulsbo 30-May-18 19:29
Re: Life in the universe probably common 313 Susan Doris 21-Dec-17 16:10
Re: Life in the universe probably common 340 Aine 21-Dec-17 16:25
Re: Life in the universe probably common 313 Vanya 21-Dec-17 18:45
Re: Life in the universe probably common 317 D-Archer 21-Dec-17 16:03
Re: Life in the universe probably common 334 drrayeye 21-Dec-17 19:17
Re: Life in the universe probably common 365 D-Archer 22-Dec-17 08:56
Ingredients for Life Revealed in Meteorites That Fell to Earth 288 brett z 11-Jan-18 00:21
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 281 Aine 11-Jan-18 14:23
Re: Ingredients for Life Revealed in Meteorites That Fell to Earth 212 brett z 11-Jan-18 23:07
Blue sky thinking 271 drrayeye 11-Jan-18 18:29
Re: Blue sky thinking 255 Aine 11-Jan-18 18:55
Re: Blue sky thinking 272 drrayeye 11-Jan-18 19:24
Re: Blue sky thinking 279 Aine 11-Jan-18 19:36
Re: Blue sky thinking 282 drrayeye 11-Jan-18 22:05
Re: Blue sky thinking 283 carolb 11-Jan-18 21:14
Re: Blue sky thinking 302 brett z 11-Jan-18 23:04
Re: Blue sky thinking 313 drrayeye 11-Jan-18 23:44
Re: Blue sky thinking 271 brett z 11-Jan-18 23:55
Re: Blue sky thinking 254 drrayeye 12-Jan-18 03:19
I don't agree with your comparison 259 brett z 12-Jan-18 05:18
Maybe you misinterpreted 281 drrayeye 12-Jan-18 09:16
no, maybe you misinterpreted 280 brett z 13-Jan-18 23:24
Re: no, maybe you misinterpreted 253 Aine 14-Jan-18 00:18
Stuart Wolpert 240 drrayeye 14-Jan-18 08:10
Re: Stuart Wolpert 384 brett z 14-Jan-18 09:29
Re: Blue sky thinking 246 D-Archer 24-May-18 07:35
Life Paradigm 218 D-Archer 24-May-18 07:20
Re: Life Paradigm 253 gulsbo 26-May-18 19:02
Re: Life Paradigm 213 D-Archer 27-May-18 10:29
Re: Life in the universe probably common 234 gulsbo 26-May-18 17:38
Re: Life in the universe probably common 214 D-Archer 27-May-18 10:30
Re: Life in the universe probably common 212 gulsbo 30-May-18 19:31
Re: Life in the universe probably common 198 D-Archer 31-May-18 09:35
Re: Life in the universe probably common 298 gulsbo 31-May-18 17:47
Life Paradigm - synopsis 243 D-Archer 05-Jun-18 12:12
Re: Life Paradigm - synopsis 218 gulsbo 12-Jun-18 12:26
Re: Life Paradigm - synopsis 193 D-Archer 14-Jun-18 10:10
Re: Life Paradigm - synopsis 219 gulsbo 14-Jun-18 15:34
Re: Life Paradigm - synopsis 198 jeffreyw 14-Jun-18 17:47
Re: Life Paradigm - synopsis 401 D-Archer 15-Jun-18 12:05


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