Here is an article suggesting that complex metazoans came to be because of rising oxygen levels.
Solving Darwin's Dilemma: Oxygen May Be The Clue To First Appearance Of Large Animals
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Michael
Nuclear is the only real option!
http://www.nuclearspace.com/Liberty_ship_menupg.aspx
Who died and left you in charge? Captain Bipto!
The early bird might get the worm but the second mouse gets the cheese!
Life is the poetry of the universe.
Love is the poetry of life.
Over heard from a three year old, "Daddy why do my toes get sticky when I eat strawberry jam?"
Never wrestle a troll. You both get dirty and the troll likes it
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