Saviourmachine,
It's a strawmen, 'average complexity' is an useless quantity. Let's say it like this: "In any case, depending on how you define it, earth is still, on average, not much more complex than it was 3 mld years ago. Almost all non-living, complex structures are simpler than bacteria. Almost all the mass of complex structures is in very simple complex (non-living) forms. And by "almost all" I mean darn near ALL."
You see, the 'average complexity' depends heavily on the denominator: all vertibrates? all living things? all existing complex forms? all material forms?
It's very, very simple, mate. 3bn years ago ther were only unicellular prokaryotes. Today they still exist, but with the addition of MORE COMPLEX eukarotes, both unicellular & multicellular.
Somewhere along the line complexity increased in order to achieve the eukarotic condition & multicellularity.
Mark
There are 10 kinds of people in this world; those that understand binary, & those that don't
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