Sorry Jar.
I have a high flying graphic artist for a sister and have picked up little bits over the years as to what constitutes graphic art. And if she were looking at the options she would plump for either the existing or the last proposed as meriting mention.
I would guess she would agree with me that the original, graphic artisted-ly would win hands down - losing only because it is "old"
It has essential elements: a depiction of evolution with is jaw agape - consuming without fear or favour. It has one of the most beautiful images we have seen (a representation of that famous Apollo photo). And a maelstrom in the middle representing both the debate and either way it came about. And sat atop: the purpose of the site in no uncertain terms.
The best new candidate (judging by the opinion so far), although tasteful, cool and crisp (if needing some polishing) represents a far more polarized view and tends to suppose some of the answers we are supposed to be questioning.