posted on Aug, 9 2015 @ 05:38 PM
Well what i'm saying is that based on the graph below, is that there might be enough undocumented space in between the Hadean and Archean period.
As stated in the second link, only between 5 and 40% of current planetary surfaces date to the Archean. So the Hadean was hot and with bombardment,
but towards it's end it stops and it cols at 4.2 ga.. Already we have when the Archean begins the temperature and stable conditions for life.
It says on the 2rd link that life begins to appear around 3.5 bill years. So thats the oldest prokaryotes and no multicell life, BUT thats only what
has been found because only 5-40% of land remains. Let's take a round 25% remaining land from Archean...we have a period of 1.5 billion years when the
plates have been moving and 75% recycled aka gone, turned into magma and new land formed.
Given that the graph shows about 1.5 billion between prokaryotes and animals...There is the space in the time frame from end of Hadean( almost no
remaining land mass) to limit of Archean/proterozoic of about 3.8-2.5 bil or ''ga'' as per graph. 1.5 billion years where the bombardment ended,
surface cooled, and we don't have access to most of the surface.
1.5 billion years to go from single cell to multi cell and another 200 years to space faring species.
https ://en. wikipedia. org/wiki /Geological_history_of_Earth#/ media/File: Geologic_Clock_with_events_and_periods . svg
edit on 9-8-2015 by Choice777 because: That picture's link come up weird, so remove the
edit on 9-8-2015 by Choice777 because: (no reason given)
edit on 9-8-2015 by Choice777 because: (no reason