how old is earth? when did the origin of life take place?

how old is earth? when did the origin of life take place?

所有跟贴·加跟贴·新语丝读书论坛

送交者: yell 于 2008-05-05, 10:01:53:

Earth is about 4.6 billions yearrs old?

Life started about 3.8 billions years ago

Cambrian explosion ”生物大爆炸理论－nonaccurate translation"“ - yell (170 bytes) 2008-05-05, 10:50:27 (223782)
- 然后在0.44 BYA, jawed vertebrate出现了。0.40 BYA, 有了陆地植物 - yell (130 bytes) 2008-05-05, 11:01:18 (223793)
原始的cellular life从inorganic materils净化迩来”只“用了 - yell (32 bytes) 2008-05-05, 10:06:45 (223766)