Origin of life on earth.

[Gustav]

again..."on earth" muddles
why should it? (muddle that is)

edit: ok, equal weight for 2, 3 and 4

 

[iceaura]

Life on earth came into existence 'by itself' through abiotic processes.
Notice 'abiotic'.
Life on earth was seeded by organic molecules from space.
Notice 'organic'.
These two options are not the same.

The organic molecules from space could have been part of the abiotic processes - it's almost certain (unless space and meteors and such were much different 4 billion years ago) that the earth was pelted with many tons of various organic molecules.

It seems more likely that actual living things emerged on the planet, in some place protected from the conditions of space, though. Easier.

One point: once anything capable of even partial and multi-stage reproduction (such as certain clays), under even rare circumstances, got going, there was nothing to stop it - it would have covered the planet in evolved variations of itself within a few million years easily.

 

[Gustav]

a fungus?

 

[Gustav]

The organic molecules from space could have been part of the abiotic processes -

citation - ..as gustav suggested...."

/waiting